Question

【题目】读短文，根据短文内容选择最佳答案。
C
When the weather is hot, you go to a lake or an ocean. When you are near a lake or an ocean, you feel cool. Why? The sun makes the earth hot, but it can not make the water hot. Though the air over the earth becomes hot, the air over the water stays cool. The hot air over the earth goes up, then the cool air over the water moves in and takes the place of the hot air. When you are near a lake or an ocean, you feel the cool air when it moves in. You feel the wind and the wind makes you cool.
Of course, scientists cannot answer all of our questions. If we ask "Why is the ocean full of salt?" scientists will say that the salt comes from rocks. When a rock gets very hot or very cool, it cracks (崩裂) , and rain falls into the cracks. The rain then carries the salt into the earth and the rivers. The rivers carry the salt into the ocean. But then we ask "What happens to the salt in the ocean? The ocean does not get saltier every year." scientists are not sure about the answer to the question.
We know a lot about our world. But there are still many answers that we do not have, and we are curious(好奇的).
（1）In the first paragraph, the underlined word "it" refers to .
A.The hot air over the water
B.The cool air over the earth
C.The hot air over the earth
D.The cool air over the water
（2）Now scientists know.
A.What makes people feel cool near a lake or an ocean in summer
B.Everything about the ocean
C.What happens to the salt in the ocean
D.Why the ocean does not get more saltier
（3）A rock crack when .
A.rain falls
B.it gets very hot
C.it gets very cold
D.Both B and C
（4）Which of the following is NOT mentioned in this passage?
A.The reason why people feel cool when they are near a lake or an ocean in hot weather.
B.The reason why the ocean doesn't get saltier every year.
C.The reason why the water in the ocean is salty.
D.The reason why rocks crack.
（5）The main idea of this passage is that .
A.people feel cool when they are near a lake or an ocean
B.scientists can explain many things, but not everything
C.scientists can explain everything about the ocean
D.the salt in the ocean comes from rocks

Answer 1

【答案】
（1）B
（2）A
（3）D
（4）D
（5）B
【解析】本文属于说明文阅读，作者通过这篇文章向我们介绍了科学家们能解释很多我们不理解 的事情。
（1）推理判断题，根据第一段The hot air over the earth goes up, then the cool air over the water moves in and takes the place of the hot air. When you are near a lake or an ocean, you feel the cool air when it moves in. 可知此处的it指的是前文提到的冷空气，故选B。
（2）细节理解题，根据第一段The hot air over the earth goes up, then the cool air over the water moves in and takes the place of the hot air. When you are near a lake or an ocean, you feel the cool air when it moves in.可知如今科学家们知道为什么夏天靠近海的人会感到凉爽，故选A。
（3）细节理解题，根据第二段When a rock gets very hot or very cool, it cracks (崩裂) , and rain falls into the cracks.可知当很热或很冷的时候岩石会裂开，故选D。
（4）细节理解题，通读全文可知作者在文章中没有解释岩石断裂的原因，故选D。
（5）主旨大意题，通读全文可知作者通过这篇文章向我们介绍了科学家可以解释很多东西，但是不是所有的都能解释，故选B。