题目

7-9 单选题
7.The sea looks very pretty when the sun is shining on it.It can be very rough when there is a strong wind.The sea is very big.It covers three quarters of the globe!The sea is also very deep in some places.There is one spot near the Philippines,where the sea is about 11 kilometers deep.The highest mountain in the world is about 9 kilometers high.If that mountain was put in the sea at that place,there would still be 3 kilometers of water above it!What a deep place!
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 millions of tiny living things that float in the sea.Many fish live by eating them.
The sea can be very cold.When the diver goes downwards,the sea becomes colder and colder.When the diver goes deeper,the water exerts greater pressures on him.The diver has to wear a diving suit made of metal.People who want to go very deep should use a very strong diving ship.They can even go dow

提问时间：2021-03-18

答案

d、When the diver dives downward,the sea gets colder and colder.
b、consists
d、75%
真简单 哈哈