¡¡¡¡If you have swum in the sea, you know that it is salty. You can taste the salt. Rivers, which flow into the sea, carry salt from the land into the sea. Some parts of the sea are saltier than other parts. There is one sea, called the Dead Sea, which is very salty. It is so salty that swimmers cannot sink! Fish cannot live in the Dead Sea!
¡¡¡¡In most parts of the sea, there are plenty of fishes and plants. Some live near the top of the sea. Others live deep down. There are also millions of tiny living things that float in the sea. These floating things are so small that it is hard to see them. Many fish live by eating these.
¡¡¡¡The sea can be very cold Divers who go deep down in the sea, know this. On the top the water may be warm. When the diver goes downwards, the sea becomes colder and colder. Another thing happens. When the diver goes deeper, the water above presses down on him. It squeezes him. Then the diver has to wear clothes made of metal. But he cannot go very deep. Some people who wanted to go very deep used a very strong diving ship! They went down to the deepest part of the sea in it. They went down to a depth of eleven kilometers!
Á·Ï°£º
1. When does the sea look beautiful?
A) When it is calm
B) When the weather is fine
C) When there is a strong wind
D) When there is a storm
2. How much of the earth's surface does land cover£¿
A£© 15%
B£© 25%
C£© 30%
D£© 45%
3. Why does the author cite the sea somewhere near Japan?
A) To show that the sea in some places is very deep.
B) To show that the sea in some places is very shallow
C) To show that its depth is 9 kilometers greater than the height of the highest mountain
D) To show that its depth is 11 kilometers greater than the height of the highest mountain
4. Which of the following statements about the Dead Sea is NOT true?
A) There are plenty of fishes in it.
B) It is a safe place for swimmers.
C) It is extremely salty.
D) No fish can be found in it.
5. Why can't people go very deep in the sea?
A) Because the deepest part of the sea is very cold.
B) Because the deepest part of the sea is very rough.
C) Because the pressure of the water at great depths is unendurable.
D) Because fierce fish usually live there.

Key: BBAAC

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