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5、Federal regulators Wednesday approved a plan to create a nationwide emergency alert system using text messages delivered to cell phones.Text messages have exploded in popularity in recent years, particularly among young people.The wireless industryls trade association, CTIA, estimates more than 48 billion text messages are sent each month.

       The plan comes from the Warning Alert and Response Network Act, a 2006 federal law that requires improvements to the nation's emergency alert system.The act tasked the Federal Communications Commission (FCC)by coming up with new ways to alert the public about emergencies.

       "The ability to deliver accurate and timely warnings and alerts through cell phones and other mobile services is an important next step in our efforts to help ensure that the American public has the information they need to take action to protect themselves and their families before and during disasters and other emergencies," FCC Chairman Kevin Martin said following approval of the plan.

       Participation in the alert system by carriers -telecommunications companies is voluntary, but it has received solid support from the wireless industry.The program would be optional for cell phone users.They also may not be charged for receiving alerts.

       There would be three different types of messages, according to the rules.The first would be a national alert from the president, likely involving a terrorist attack or a nationwide disease.The second would involve "approaching threats," which could include natural disasters like hurricanes or storms or even university shootings.The third would be reserved for child kidnapping emergencies.The service could be in place by 2010.

1.What is the purpose of the approved plan?

       A.To warn people of emergencies through messages.

       B.To popularize the use of cell phones.

       C.To estimate the monthly number of messages.

       D.To promote the wireless industry.

2.According to the passage, cell phone users ____.

      A.must accept the alert service.             B.may enjoy the alert service for free.

       C.must send the alerts to others                D.may choose the types of messages

3.An alert message will NOT be sent if____.

       A.a(chǎn) child gets robbed in the street             B.a(chǎn) university shooting happens

       C.a(chǎn) natural disaster happens                     D.a(chǎn) terrorist attack occurs

4.Which of the following can be the best title for the text?

       A.Cell Phone Alerts Protecting Students

       B.Cell Phone Alerts by Wireless Industry

       C.Cell Phone Alerts of National Disasters

       D.Cell Phone Alerts Coming Soon

5、ABAD

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相關習題

科目:高中英語 來源: 題型:閱讀理解

Federal regulators Wednesday approved a plan to create a nationwide emergency alert (警報) system using text messages delivered to cell phones.

Text messages have exploded in popularity in recent years, particularly among young people. The wireless industry’s trade association, CTIA, estimates (估計) more than 48 billions text messages are sent each month.

The plan comes from the Warning Alter and Response Network Act, a 2006 federal law that requires improvement to the nation’s emergency alter system. The act tasked the Federal Communications Commission (FCC) with coming up with new ways to alter the public about emergencies.

“The ability to deliver accurate and timely warning and alters through cell phone and other mobile services is an important next step in our efforts to help ensure that the American public has the information they need to take action to protect themselves and their families before, and during, disasters and other emergencies,” FCC Chairman Kevin Martin said following approval of the plan.

Participation in the alter system by carriers — telecommunication companies — is voluntary, but it has received solid support from the wireless industry.

The program would be optional for cell phone users. They also may not be charged for receiving alters.

There would be three types of messages, according to the rules.

The first would be a national alter from the president, likely involving  a terrorists attack or natural disaster. The second would involve “approaching threats,” which could include natural disasters like hurricanes or storms or even university shootings. The third would be reserved for child abduction (綁架)emergencies, or so-called Amber Alerts.

The service could be in place by 2010.

61. What is the purpose of the approval plan?

A. To warn people of emergencies via message.

B. To popularize the use of cell phone.

C. To estimate the monthly number of messages.

D. To promote the wireless industry.

62. The improvement to the present system is in the charge of ______.

A. CTLA.   B. the Warning Alert and Response Network

C. FCC    D. federal regulators

63. The carriers’ participation in the system is determined by _______.

A. the US federal government   B. mobile phone users

C. the carriers themselves       D. the law of the United States

64. Which of the following is true of cell phone users?

They must accept the alert service. 

B. They may enjoy the alert service for free.

C. They must send the alerts to others.

D. They may choose the types of messages.

65. An alert message will NOT be sent if __________.

A. a child loses his way         B. a university shooting happens

C. a natural disaster happens   D, a terrorist attack occurs

66. Which of the following would be the best title for the test?

A. Cell Phone Alerts Protecting Students

B. Cell Phone Alerts by Wireless Industry

C. Cell Phone Alerts Natural Disasters

D. Cell Phone Alerts Coming Soon

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

Federal regulators Wednesday approved a plan to create a nationwide emergency alert (警報) system using text messages delivered to cell phones.

Text messages have exploded in popularity in recent years, particularly among young people. The wireless industry’s trade association, CTIA, estimates (估計) more than 48 billions text messages are sent each month.

The plan comes from the Warning Alter and Response Network Act, a 2006 federal law that requires improvement to the nation’s emergency alter system. The act tasked the Federal Communications Commission (FCC) with coming up with new ways to alter the public about emergencies.

“The ability to deliver accurate and timely warning and alters through cell phone and other mobile services is an important next step in our efforts to help ensure that the American public has the information they need to take action to protect themselves and their families before, and during, disasters and other emergencies,” FCC Chairman Kevin Martin said following approval of the plan.

Participation in the alter system by carriers — telecommunication companies — is voluntary, but it has received solid support from the wireless industry.

The program would be optional for cell phone users. They also may not be charged for receiving alters.

There would be three types of messages, according to the rules.

The first would be a national alter from the president, likely involving  a terrorists attack or natural disaster. The second would involve “approaching threats,” which could include natural disasters like hurricanes or storms or even university shootings. The third would be reserved for child abduction (綁架)emergencies, or so-called Amber Alerts.

The service could be in place by 2010.

What is the purpose of the approval plan?

A. To warn people of emergencies via message.

B. To popularize the use of cell phone.

C. To estimate the monthly number of messages.

D. To promote the wireless industry.

The improvement to the present system is in the charge of ______.

A. CTLA.   B. the Warning Alert and Response Network

C. FCC    D. federal regulators

The carriers’ participation in the system is determined by _______.

A. the US federal government   B. mobile phone users

C. the carriers themselves       D. the law of the United States

Which of the following is true of cell phone users?

They must accept the alert service. 

B. They may enjoy the alert service for free.

C. They must send the alerts to others.

D. They may choose the types of messages.

An alert message will NOT be sent if __________.

A. a child loses his way         B. a university shooting happens

C. a natural disaster happens   D, a terrorist attack occurs

Which of the following would be the best title for the test?

A. Cell Phone Alerts Protecting Students

B. Cell Phone Alerts by Wireless Industry

C. Cell Phone Alerts Natural Disasters

D. Cell Phone Alerts Coming Soon

查看答案和解析>>

科目:高中英語 來源:2008年普通高等學校招生全國統(tǒng)一考試山東卷英語試題 題型:閱讀理解

Federal regulators Wednesday approved a plan to create a nationwide emergency alert (警報) system using text messages delivered to cell phones.
Text messages have exploded in popularity in recent years, particularly among young people. The wireless industry’s trade association, CTIA, estimates (估計) more than 48 billions text messages are sent each month.
The plan comes from the Warning Alter and Response Network Act, a 2006 federal law that requires improvement to the nation’s emergency alter system. The act tasked the Federal Communications Commission (FCC) with coming up with new ways to alter the public about emergencies.
“The ability to deliver accurate and timely warning and alters through cell phone and other mobile services is an important next step in our efforts to help ensure that the American public has the information they need to take action to protect themselves and their families before, and during, disasters and other emergencies,” FCC Chairman Kevin Martin said following approval of the plan.
Participation in the alter system by carriers — telecommunication companies — is voluntary, but it has received solid support from the wireless industry.
The program would be optional for cell phone users. They also may not be charged for receiving alters.
There would be three types of messages, according to the rules.
The first would be a national alter from the president, likely involving  a terrorists attack or natural disaster. The second would involve “approaching threats,” which could include natural disasters like hurricanes or storms or even university shootings. The third would be reserved for child abduction (綁架)emergencies, or so-called Amber Alerts.
The service could be in place by 2010.
【小題1】What is the purpose of the approval plan?

A.To warn people of emergencies via message.
B.To popularize the use of cell phone.
C.To estimate the monthly number of messages.
D.To promote the wireless industry.
【小題2】 The improvement to the present system is in the charge of ______.
A. CTLA.   B. the Warning Alert and Response Network
C. FCC    D. federal regulators
【小題3】The carriers’ participation in the system is determined by _______.
A.the US federal governmentB.mobile phone users
C.the carriers themselvesD.the law of the United States
【小題4】Which of the following is true of cell phone users?
They must accept the alert service. 
B. They may enjoy the alert service for free.
C. They must send the alerts to others.
D. They may choose the types of messages.
【小題5】An alert message will NOT be sent if __________.
A. a child loses his way         B. a university shooting happens
C. a natural disaster happens   D, a terrorist attack occurs
【小題6】 Which of the following would be the best title for the test?
A.Cell Phone Alerts Protecting Students
B.Cell Phone Alerts by Wireless Industry
C.Cell Phone Alerts Natural Disasters
D.Cell Phone Alerts Coming Soon

查看答案和解析>>

科目:高中英語 來源:2013屆江西省吉安一中高三上學期期中考試英語試卷(帶解析) 題型:閱讀理解


Federal regulators Wednesday approved a plan to create a nationwide emergency alert(警報)system using text messages delivered to cell phones.
Text messages have exploded in popularity in recent years,particularly among young people.The wireless industry’s trade association, CTIA,estimates(估計)more than 48 billion text messages are sent each month.
The plan comes from the Warning Alert and Response Network Act,a 2006 federal law that requires improvement to the nation's emergency alert system.The act tasked the Federal Communications Commission (FCC) with coming up with new ways to alert the public about emergencies.
“The ability to deliver accurate and timely warnings.and alerts through cell phones and other mobile services is an important next step in our efforts to help ensure that the American public.has the information they need to take action to protect themselves and their families before, and during,disasters and other emergencies. ”FCC Chairman Kevin Martin said following approval of the plan.
Participation in the alert system by carriers—telecommunications companies is voluntary, but it has received solid support from the wireless industry.
The program would be optional for cell phone users. They also may not be charged for receiving alerts.
There would be three different types of messages,according to the rules.  
The first would be a national alert from the president,likely involving a terrorist attack or natural disaster.The second would involve “approaching threats,”which could include natural disasters like hurricanes or storms or even university shootings. The third would be reserved for child abduction(綁架)emergencies,or so-called Amber Alerts.
The service could be in place by 2010.
【小題1】 What is the purpose of the approved plan?

A.To warn people of emergencies via messages.
B.To popularize the use of cell phones.
C.To estimate the monthly number of messages.
D.To promote the wireless industry.
【小題2】 The improvement to the present system is in the charge of ________.
A.CTIAB.the Warning Alert and Response Network
C.FCC D.federal regulators
【小題3】 The carriers' participation in the system is determined by ________.
A.the US federal governmentB.mobile phone users
C.the carriers themselves D.the law of the United States
【小題4】. Which of the following is true of cell phone users?
A.They must accept the alert service.
B.They may enjoy the alert service for free.
C.They must send the alerts to others
D.They may choose the types of messages
【小題5】. Which of the following would be the best title for the text?
A,Cell Phone Alerts Protecting Students
B.   Cell Phone Alerts by Wireless Industry
C. Cell Phone Alefts of National Disasters
D. Cell Phone Alerts Coming Soon

查看答案和解析>>

科目:高中英語 來源:2013屆江西省高三上學期期中考試英語試卷(解析版) 題型:閱讀理解

Federal regulators Wednesday approved a plan to create a nationwide emergency alert(警報)system using text messages delivered to cell phones.

Text messages have exploded in popularity in recent years,particularly among young people.The wireless industry’s trade association, CTIA,estimates(估計)more than 48 billion text messages are sent each month.

The plan comes from the Warning Alert and Response Network Act,a 2006 federal law that requires improvement to the nation's emergency alert system.The act tasked the Federal Communications Commission (FCC) with coming up with new ways to alert the public about emergencies.

“The ability to deliver accurate and timely warnings.and alerts through cell phones and other mobile services is an important next step in our efforts to help ensure that the American public.has the information they need to take action to protect themselves and their families before, and during,disasters and other emergencies. ”FCC Chairman Kevin Martin said following approval of the plan.

Participation in the alert system by carriers—telecommunications companies is voluntary, but it has received solid support from the wireless industry.

The program would be optional for cell phone users. They also may not be charged for receiving alerts.

There would be three different types of messages,according to the rules.  

The first would be a national alert from the president,likely involving a terrorist attack or natural disaster.The second would involve “approaching threats,”which could include natural disasters like hurricanes or storms or even university shootings. The third would be reserved for child abduction(綁架)emergencies,or so-called Amber Alerts.

The service could be in place by 2010.

1. What is the purpose of the approved plan?

A.To warn people of emergencies via messages.

B.To popularize the use of cell phones.

C.To estimate the monthly number of messages.

D.To promote the wireless industry.

2. The improvement to the present system is in the charge of ________.

A.CTIA

B.the Warning Alert and Response Network

C.FCC

D.federal regulators

3. The carriers' participation in the system is determined by ________.

A.the US federal government

B.mobile phone users

C.the carriers themselves

D.the law of the United States

4.. Which of the following is true of cell phone users?

A.They must accept the alert service.

B.They may enjoy the alert service for free.

C.They must send the alerts to others

D.They may choose the types of messages

5.. Which of the following would be the best title for the text?

A,Cell Phone Alerts Protecting Students

B.   Cell Phone Alerts by Wireless Industry

C. Cell Phone Alefts of National Disasters

D. Cell Phone Alerts Coming Soon

 

查看答案和解析>>

科目:高中英語 來源:2008年普通高等學校招生全國統(tǒng)一考試山東卷英語試題 題型:閱讀理解

Federal regulators Wednesday approved a plan to create a nationwide emergency alert (警報) system using text messages delivered to cell phones.

Text messages have exploded in popularity in recent years, particularly among young people. The wireless industry’s trade association, CTIA, estimates (估計) more than 48 billions text messages are sent each month.

The plan comes from the Warning Alter and Response Network Act, a 2006 federal law that requires improvement to the nation’s emergency alter system. The act tasked the Federal Communications Commission (FCC) with coming up with new ways to alter the public about emergencies.

“The ability to deliver accurate and timely warning and alters through cell phone and other mobile services is an important next step in our efforts to help ensure that the American public has the information they need to take action to protect themselves and their families before, and during, disasters and other emergencies,” FCC Chairman Kevin Martin said following approval of the plan.

Participation in the alter system by carriers — telecommunication companies — is voluntary, but it has received solid support from the wireless industry.

The program would be optional for cell phone users. They also may not be charged for receiving alters.

There would be three types of messages, according to the rules.

The first would be a national alter from the president, likely involving  a terrorists attack or natural disaster. The second would involve “approaching threats,” which could include natural disasters like hurricanes or storms or even university shootings. The third would be reserved for child abduction (綁架)emergencies, or so-called Amber Alerts.

The service could be in place by 2010.

1.What is the purpose of the approval plan?

A.To warn people of emergencies via message.

B.To popularize the use of cell phone.

C.To estimate the monthly number of messages.

D.To promote the wireless industry.

2. The improvement to the present system is in the charge of ______.

A. CTLA.   B. the Warning Alert and Response Network

C. FCC    D. federal regulators

3.The carriers’ participation in the system is determined by _______.

A.the US federal government

B.mobile phone users

C.the carriers themselves

D.the law of the United States

4.Which of the following is true of cell phone users?

They must accept the alert service. 

B. They may enjoy the alert service for free.

C. They must send the alerts to others.

D. They may choose the types of messages.

5.An alert message will NOT be sent if __________.

A. a child loses his way         B. a university shooting happens

C. a natural disaster happens   D, a terrorist attack occurs

6. Which of the following would be the best title for the test?

A.Cell Phone Alerts Protecting Students

B.Cell Phone Alerts by Wireless Industry

C.Cell Phone Alerts Natural Disasters

D.Cell Phone Alerts Coming Soon

 

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

Federal regulators Wednesday approved a plan to create a nationwide emergency alert (警報) system using text messages delivered to cell phones.

Text messages have exploded in popularity in recent years, particularly among young people. The wireless industry’s trade association, CTIA, estimates (估計) more than 48 billions text messages are sent each month.

The plan comes from the Warning Alter and Response Network Act, a 2006 federal law that requires improvement to the nation’s emergency alter system. The act tasked the Federal Communications Commission (FCC) with coming up with new ways to alter the public about emergencies.

“The ability to deliver accurate and timely warning and alters through cell phone and other mobile services is an important next step in our efforts to help ensure that the American public has the information they need to take action to protect themselves and their families before, and during, disasters and other emergencies,” FCC Chairman Kevin Martin said following approval of the plan.

Participation in the alter system by carriers ― telecommunication companies ― is voluntary, but it has received solid support from the wireless industry.

The program would be optional for cell phone users. They also may not be charged for receiving alters.

There would be three types of messages, according to the rules.

The first would be a national alter from the president, likely involving  a terrorists attack or natural disaster. The second would involve “approaching threats,” which could include natural disasters like hurricanes or storms or even university shootings. The third would be reserved for child abduction (綁架)emergencies, or so-called Amber Alerts.

The service could be in place by 2010.

61. What is the purpose of the approval plan?

A. To warn people of emergencies via message.

B. To popularize the use of cell phone.

C. To estimate the monthly number of messages.

D. To promote the wireless industry.

62. The improvement to the present system is in the charge of ______.

A. CTLA.   B. the Warning Alert and Response Network

C. FCC    D. federal regulators

63. The carriers’ participation in the system is determined by _______.

A. the US federal government   B. mobile phone users

C. the carriers themselves       D. the law of the United States

64. Which of the following is true of cell phone users?

They must accept the alert service. 

B. They may enjoy the alert service for free.

C. They must send the alerts to others.

D. They may choose the types of messages.

65. An alert message will NOT be sent if __________.

A. a child loses his way         B. a university shooting happens

C. a natural disaster happens   D, a terrorist attack occurs

66. Which of the following would be the best title for the test?

A. Cell Phone Alerts Protecting Students

B. Cell Phone Alerts by Wireless Industry

C. Cell Phone Alerts Natural Disasters

D. Cell Phone Alerts Coming Soon

查看答案和解析>>

科目:高中英語 來源:2008年高考試題(山東卷)解析版 題型:閱讀理解

 

Federal regulators Wednesday approved a plan to create a nationwide emergency alert (警報) system using text messages delivered to cell phones.

Text messages have exploded in popularity in recent years, particularly among young people. The wireless industry’s trade association, CTIA, estimates (估計) more than 48 billions text messages are sent each month.

The plan comes from the Warning Alter and Response Network Act, a 2006 federal law that requires improvement to the nation’s emergency alter system. The act tasked the Federal Communications Commission (FCC) with coming up with new ways to alter the public about emergencies.

“The ability to deliver accurate and timely warning and alters through cell phone and other mobile services is an important next step in our efforts to help ensure that the American public has the information they need to take action to protect themselves and their families before, and during, disasters and other emergencies,” FCC Chairman Kevin Martin said following approval of the plan.

Participation in the alter system by carriers — telecommunication companies — is voluntary, but it has received solid support from the wireless industry.

The program would be optional for cell phone users. They also may not be charged for receiving alters.

There would be three types of messages, according to the rules.

The first would be a national alter from the president, likely involving  a terrorists attack or natural disaster. The second would involve “approaching threats,” which could include natural disasters like hurricanes or storms or even university shootings. The third would be reserved for child abduction (綁架)emergencies, or so-called Amber Alerts.

The service could be in place by 2010.

1.What is the purpose of the approval plan?

A. To warn people of emergencies via message.

B. To popularize the use of cell phone.

C. To estimate the monthly number of messages.

D. To promote the wireless industry.

2.The improvement to the present system is in the charge of ______.

A. CTLA.   B. the Warning Alert and Response Network

C. FCC    D. federal regulators

3.The carriers’ participation in the system is determined by _______.

A. the US federal government   B. mobile phone users

C. the carriers themselves       D. the law of the United States

4.Which of the following is true of cell phone users?

They must accept the alert service. 

B. They may enjoy the alert service for free.

C. They must send the alerts to others.

D. They may choose the types of messages.

5.An alert message will NOT be sent if __________.

A. a child loses his way         B. a university shooting happens

C. a natural disaster happens   D, a terrorist attack occurs

6.Which of the following would be the best title for the test?

A. Cell Phone Alerts Protecting Students

B. Cell Phone Alerts by Wireless Industry

C. Cell Phone Alerts Natural Disasters

D. Cell Phone Alerts Coming Soon

 

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

Federal regulators Wednesday approved a plan to create a nationwide emergency alert(警報)system using text messages delivered to cell phones.
Text messages have exploded in popularity in recent years,particularly among young people.The wireless industry’s trade association, CTIA,estimates(估計)more than 48 billion text messages are sent each month.
The plan comes from the Warning Alert and Response Network Act,a 2006 federal law that requires improvement to the nation's emergency alert system.The act tasked the Federal Communications Commission (FCC) with coming up with new ways to alert the public about emergencies.
“The ability to deliver accurate and timely warnings.and alerts through cell phones and other mobile services is an important next step in our efforts to help ensure that the American public.has the information they need to take action to protect themselves and their families before, and during,disasters and other emergencies. ”FCC Chairman Kevin Martin said following approval of the plan.
Participation in the alert system by carriers—telecommunications companies is voluntary, but it has received solid support from the wireless industry.
The program would be optional for cell phone users. They also may not be charged for receiving alerts.
There would be three different types of messages,according to the rules.  
The first would be a national alert from the president,likely involving a terrorist attack or natural disaster.The second would involve “approaching threats,”which could include natural disasters like hurricanes or storms or even university shootings. The third would be reserved for child abduction(綁架)emergencies,or so-called Amber Alerts.
The service could be in place by 2010

  1. 1.

    What is the purpose of the approved plan?

    1. A.
      To warn people of emergencies via messages
    2. B.
      To popularize the use of cell phones
    3. C.
      To estimate the monthly number of messages
    4. D.
      To promote the wireless industry
  2. 2.

    The improvement to the present system is in the charge of ________

    1. A.
      CTIA
    2. B.
      the Warning Alert and Response Network
    3. C.
      FCC
    4. D.
      federal regulators
  3. 3.

    The carriers' participation in the system is determined by ________

    1. A.
      the US federal government
    2. B.
      mobile phone users
    3. C.
      the carriers themselves
    4. D.
      the law of the United States
  4. 4.

    Which of the following is true of cell phone users?

    1. A.
      They must accept the alert service
    2. B.
      They may enjoy the alert service for free
    3. C.
      They must send the alerts to others
    4. D.
      They may choose the types of messages
  5. 5.

    Which of the following would be the best title for the text?

    1. A.
      ,Cell Phone Alerts Protecting Students
    2. B.
      Cell Phone Alerts by Wireless Industry
    3. C.
      Cell Phone Alefts of National Disasters
    4. D.
      Cell Phone Alerts Coming Soon

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

Federal regulators Wednesday approved a plan to create a nationwide emergency alert (警報) system using text messages delivered to cell phones.

Text messages have exploded in popularity in recent years, particularly among young people. The wireless industry’s trade association, CTIA, estimates (估計) more than 48 billions text messages are sent each month.

The plan comes from the Warning Alter and Response Network Act, a 2006 federal law that requires improvement to the nation’s emergency alter system. The act tasked the Federal Communications Commission (FCC) with coming up with new ways to alter the public about emergencies.

“The ability to deliver accurate and timely warning and alters through cell phone and other mobile services is an important next step in our efforts to help ensure that the American public has the information they need to take action to protect themselves and their families before, and during, disasters and other emergencies,” FCC Chairman Kevin Martin said following approval of the plan.

Participation in the alter system by carriers ― telecommunication companies ― is voluntary, but it has received solid support from the wireless industry.

The program would be optional for cell phone users. They also may not be charged for receiving alters.

There would be three types of messages, according to the rules.

The first would be a national alter from the president, likely involving a terrorists attack or natural disaster. The second would involve “approaching threats,” which could include natural disasters like hurricanes or storms or even university shootings. The third would be reserved for child abduction (綁架)emergencies, or so-called Amber Alerts.

The service could be in place by 2010.

 

64. What is the purpose of the approval plan?

A. To promote the wireless industry.

B. To popularize the use of cell phone.

C. To estimate the monthly number of messages.

D. To warn people of emergencies via message.

65. The improvement to the present system is in the charge of ______.

A. federal regulators                              B. FCC

C. the Warning Alert and Response Network          D. CTLA.

66. The carriers’ participation in the system is determined by _______.

A. the US federal government                              B. mobile phone users

C. the carriers themselves                                   D. the law of the United States

67. Which of the following is true of cell phone users?

A. They may enjoy the alert service for free.

B. They must accept the alert service.

C. They must send the alerts to others.

D. They may choose the types of messages.

68. An alert message will NOT be sent if __________.

A. a natural disaster happens                           B. a university shooting happens

C. a child loses his way                                  D. a terrorist attack occurs

查看答案和解析>>


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