欧美日韩黄网欧美日韩日B片|二区无码视频网站|欧美AAAA小视频|久久99爱视频播放|日本久久成人免费视频|性交黄色毛片特黄色性交毛片|91久久伊人日韩插穴|国产三级A片电影网站|亚州无码成人激情视频|国产又黄又粗又猛又爽的

When an ant dies, other ants take it out of the nest, often within an hour after its death. This behavior interests scientists and they wonder how ants know for sure—and so soon—that another ant is dead. 

One scientist recently came up with a way to explain this ant behavior. Dong-Hwan Choe is a biologist, a scientist who studies animals and plants. He found that ants have a chemical on the outside of their bodies that signals to other ants, “I'm dead—take me away” when it is dead.

But there's a question to answer: As we know, if an ant is dead, it stops moving. But when an ant is sleeping or knocked unconscious, it is also not moving. However, other ants don't move the living ant out of the nest. How do they know this ant is not dead? Choe found that ants have another chemical on their bodies, which tells nearby ants something like, “Wait—I'm not dead yet” when it is not dead. Choe suspects that when an ant dies, the chemical that says, “Wait— I'm not dead yet” quickly goes away. When other ants detect the “dead” chemical without the “not dead yet” chemical, they move away the body.

To test his theory, Choe and his team put different chemicals on ants. When the scientists used the “I'm dead” chemical, other ants quickly moved the treated ant away. When the scientists used the “Wait—I'm not dead yet” chemical, other ants left the treated ant alone. Choe believes this behavior shows that the “not dead yet” chemical is stronger than the “dead” chemical when picked up by other ants. And that when an ant dies, the “not dead yet” chemical fades away. Other nearby ants then detect the remaining “dead” chemical and remove the body from the nest.

Understanding this behavior can help scientists figure out how to stop ants from invading new places and causing problems.

1.What is the function of the first paragraph?

A. Leading the following paragraphs.

B. Showing the main idea of the passage.

C. Introducing the background of the passage.

D. Giving a summary of the passage.

2.What can we learn from the passage?

A. Living ants can also be taken away when they are not moving.

B. When an ant dies, it can tell others using a certain chemical.

C. A living ant can pretend to be dead using a special chemical.

D. Ants often use chemicals to communicate with each other.

3.Which of the following descriptions about Dong-Hwan Choe is right?

A. Choe did this study in order to stop ants from invading new places.

B. Choe is a biologist who is only interested in animals, especially in ants.

C. Choe first came up with an idea to explain this ant behavior, and then did some tests to prove his theory.

D. Choe did the research on this ant behavior on his own.

4.What is mainly discussed in the passage?

A. experiments about how ants manage to keep their nests clean.  

B. experiments about why ants have special chemicals on their bodies.

C. experiments about why ants can have this removal behavior

D. experiments about how to decide whether an ant is dead or not.

根據(jù)短文內(nèi)容，從短文后的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)。選項(xiàng)中有兩項(xiàng)為多余選項(xiàng)。

The Internet has opened up a whole new online world for us to meet, chat and go where we’ve never been before.

But just as in face-to-face communication, there are some rules of behavior that should be followed when on line.  1. . Imagine how you’d feel if you were in the other person’s shoes.

For anything you’re about to send: ask yourself, “Would I say this to the person’s face?” If the answer is no, rewrite and reread.    2.    

If someone in the chat room is rude to you, your instinct (本能) is to fire back in the same manner. But try not to do so.   3.  If it was caused by a disagreement with another member, try to fix the situation by politely discussing it. Remember to respect the beliefs and opinions of others in the chat room.

   4.   Offer advice when asked by newcomers, as they may not be sure what to do or how to communicate. When someone makes a mistake, whether it’s a stupid question or an unnecessarily long answer, be kind about it. If it’s a small mistake, you may not need to say anything. Even if you feel strongly about it, think twice before saying anything. Having good manners yourself doesn’t give you license to correct everyone else.  5.  At the same time, if you find you are wrong, be sure to correct yourself and apologize to those that you have offended（冒犯）.

It is not polite to ask others personal questions such as their age, sex and marital status. Unless you know the person very well, and you are both comfortable with sharing personal information, don’t ask such questions.

A. If you do decide to tell someone about a mistake, point it out politely.

B. It’s natural that there are some people who speak rudely or make mistakes online.

C. Repeat the process till you feel sure that you’d feel comfortable saying the words to the person’s face.

D. Everyone was new to the network once.

E. The basic rule is simple: treat others in the same way you would want to be treated.

F. When you send short messages to a person online, you must say something beautiful to hear.

G. You should either ignore the person, or use your chat software to block their messages.

第一節(jié) 完成句子（共10小題；每小題1分，，滿分10分）

1.In the 1990s the shawls ____ _____ ________ (成為時尚)among rich people.

2.Many roads are ____ _____ _____ (狀況不佳)and accidents happen frequently.

3.In those countries where the shawls are sold, police are____ ______ _____ (嚴(yán)厲打擊) the dealers.

4.The number of young people with money to spend was _____ _____ ______(在增加).

5.Whole herds of antelopes are shot and skinned _____ _____ ______(在現(xiàn)場).

6.I am writing ______ _______ ______(回應(yīng)) your advertisement for a temporary position as a waiter.

7.Many elements of African culture were ______ ______ (添加)to the festival.

8.The Siberian tiger, ______ mainly _____(以……為食)small mammals, is found in northeastern China.

9.Wearing masks, famous people could have romantic adventures in secret and many crimes ­­______ ______ （逃脫懲處）.

10.The WWF ______ ______ (代表)the World Wide Fund for Nature.

最近，某中學(xué)英文報(bào)開設(shè)了“保護(hù)瀕危動物”的欄目。請你根據(jù)以下提示為該欄目寫一篇120個詞左右的的英文稿件。

1. 瀕危動物數(shù)量：12,000多種

2．動物瀕危的主要原因：棲息地被破壞，為高額利潤而被獵殺；并舉例說明

3. 被保護(hù)的現(xiàn)狀：政府已建立自然保護(hù)區(qū)，頒布禁令禁止獵殺及買賣，加大懲處力度

4. 提出更多建議….…

注意：文章開頭已給出，不計(jì)入總詞數(shù)。

Saving the Endangered Animals

    As is known to everyone, animals are our friends and enjoy the equal right to live happily on earth. However,

more than 12,000 species are in danger of extinction.

There are several reasons for this. _____________________________________________________________ 

____________________________________________________________________________________________

____________________________________________________________________________________________

–What do you think of _____ dress in the shop window?

   –Oh, it’s beautiful. You may give it to Linda as _____ birthday present.

A. a; a          B. the; a            C. a; the           D. the; the

The old man didn’t feel          though he stayed on the hill            ．

A. alone；lonely                 B. alone；alone                  C. lonely；alone        D. lonely；lonely

Many people came to the meeting，but    them who left early was 35．

A. a number of           B. the number              C. a lot of       D. the number of

I am grateful         you         your kind offer．

A. to；for                   B. for；to        C. to；to                D. for；for

I ___________ my father to give up smoking, but he didn’t listen to me.

A. persuaded               B. advised                  C. suggested              D. promised

You’d better           your scores and see if you have passed the exam．

A. add up               B. add up to              C. add to                      D. add to up