单选题 The floors of the ocean have many riches that can be used by man. Oil and chemicals and minerals (矿物) already are taken from the sea. By using nuclear energy, ocean water can be turned into fresh water by taking the salt out. In the near future, it is possible for human beings to produce food from farms under the sea. Food grown in the sea could help to meet the needs of population all over the world which is increasing fast. Thousands of people go hungry every day. About ten to fifteen percent of the world's people do not have enough food. Some scientists believe that someday the sea will be used to make electric power. This would help to meet the need for more power for the world's industries. The decreasing supply of coal, oil and gas shows that the need to find new kinds of power is urgent.

单选题 Human beings have already made use of ______ .

A、 nuclear energy in the lab under the sea
B、 salt water resource as fresh water
C、 minerals, chemicals and oil taken from the sea
D、 farms under the sea

【正确答案】 C

【答案解析】本题题干问“人们已经利用了海洋的什么资源”。原文第2句话指出石油、化学物质和矿物已经被从海洋中提取出来了。因此选项C. minerals, chemicals and oil taken from the sea是正确答案。

单选题 We can learn from the passage that ______ .

A、 there are now many farms under the sea producing food
B、 more than one tenth of the world's people are suffering from hunger
C、 the supply of oil, gas and coal are increasing rapidly throughout the world
D、 it is unnecessary for man to make full use of the riches of the sea

【正确答案】 B

【答案解析】本题测试辨认正确信息的能力。原文第7句话指出全世界有10％到15％的人还在挨饿。因此选项B. more than one tenth of the world's people are suffering from hunger是正确答案。

单选题 ______ can be used to turn salt water into fresh water.

【正确答案】 A

【答案解析】本题题干问“什么能源可以把咸水变成淡水”。原文第3句话指出使用核能可以把咸水变成淡水。因此选项A. Nuclear power是正确答案。

单选题 It is urgent to find new kinds of power because

A、 the world's population is increasing day by day
B、 scientists are worried about the idea of making full use of the sea into realities
C、 nuclear energy cannot meet the need for more power for the world's industries
D、 the supply of coal, oil and gas is decreasing while the need for the world's industries is increasing

【正确答案】 D

【答案解析】此题题干问“为什么我们必须找到新的能源”。原文第10句话指出煤炭、石油和天然气的减少使找到新的能源变得迫切。因此选项D. the supply of coal, oil and gas is decreasing while the need for the world's industries is increasing是正确答案。

单选题 The best title of the passage is ______ .

【正确答案】 C

【答案解析】此题有关文章的主旨。给文章选择一个最佳标题首先需要理解全文，才能找到一个既能归纳全篇主题又与内容密切相关的标题。本文主要讲述了丰富的海洋资源。因此选项C. Riches of the Sea是正确答案。