22、Cables are playing a very important part in today’s communicates. They have been in use for over 100 years, but in the early times they caused a lot of difficulties for the forerunners.
Clearly, messages can be sent across the land by means of the electric telegraph, but you cannot put up a line of telegraph posts across the sea. Messages can be sent across the ocean by radio or by cable. The cable lies on the sea bottom and it has to have very good insulation （絕緣）. If any part of it is weak, the water will get through and stop all signals.
The first cable under the sea was between England and France. It was laid in 1851. In 1851 engineers tried to lay cable across the Atlantic Ocean, but they met a lot of diffidently. Half way accrues the Atlantic the cable broke, and the ship that was laying it had to return.
Kclvin advised that another cable ought to be laid. It was mad mady and put on board a big ship. Kelvin and his friends traveled with it and after many days of hard work, they reached America without breaking the cable. Keivin himself sent the first message by cable from America in Britain. Unfortunately only 732 messages were sent through this cable before it broke.
The next cable was laid in 1866, and this time there were no problems. The ship that laid it was the Great Eastem, one of the strongest ships that time there were no problems. The ship that laid it was the Great Eastern, one of the strongest ships that have ever been built. On the other hand, it was driven by powerful engines and also by sails.
1．The undersea cable must be made strong enough to prevent .
A．fishes from eating it B．enemy stealing it
C．water getting through it D．others cutting it
2．The undersea cable that Kelvin and his friends laid was between .
A．England and France B．America and England
C．America and France D．England and Britain
3．This passage mainly tells us .
A．how Kelvin laid the cable B．how the scientists discovered the cable
C．the history of the cable in the world D．how do lay the cable in the sea
22、CBC
科目：高中英語 來源： 題型：閱讀理解
Cables are playing a very important part in today’s communicates. They have been in use for over 100 years, but in the early times they caused a lot of difficulties for the forerunners.
Clearly, messages can be sent across the land by means of the electric telegraph, but you cannot put up a line of telegraph posts across the sea. Messages can be sent across the ocean by radio or by cable. The cable lies on the sea bottom and it has to have very good insulation （絕緣）. If any part of it is weak, the water will get through and stop all signals.
The first cable under the sea was between England and France. It was laid in 1851. In 1851 engineers tried to lay cable across the Atlantic Ocean, but they met a lot of diffidently. Half way accrues the Atlantic the cable broke, and the ship that was laying it had to return.
Kclvin advised that another cable ought to be laid. It was mad mady and put on board a big ship. Kelvin and his friends traveled with it and after many days of hard work, they reached America without breaking the cable. Keivin himself sent the first message by cable from America in Britain. Unfortunately only 732 messages were sent through this cable before it broke.
The next cable was laid in 1866, and this time there were no problems. The ship that laid it was the Great Eastem, one of the strongest ships that time there were no problems. The ship that laid it was the Great Eastern, one of the strongest ships that have ever been built. On the other hand, it was driven by powerful engines and also by sails.
1．The undersea cable must be made strong enough to prevent .
A．fishes from eating it B．enemy stealing it
C．water getting through it D．others cutting it
2．The undersea cable that Kelvin and his friends laid was between .
A．England and France B．America and England
C．America and France D．England and Britain
3．This passage mainly tells us .
A．how Kelvin laid the cable B．how the scientists discovered the cable
C．the history of the cable in the world D．how do lay the cable in the sea
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