Question

Scientists have always wanted to know more about the other worlds in space.

   Years ago, they knew many facts about the moon. They knew how big it was and how far away it was from the earth. But they wanted to know more about it .They thought and thought. At last they found the only way to know more was to send men to the moon.

   The moon is about three hundred and eighty-four thousand kilometers away from the earth. A plane can not fly to the moon because the air reaches only 240 kilometers. Then there is no air. But something can fly even when there is no air. That is a rocket.

   How does a rocket fly? There is gas in the rocket. When the gas is made very hot inside the rocket, it will rush out of the end of the rocket, so it can make the rocket fly up into the sky.

   Rockets can fly far out into space. Rockets with men in them have already reached the moon. Some rockets without men in them have flown to other planets much farther away than the moon. One day rockets may be able to go to any place.

根据短文内容，从题中所给的A、B、C、D四个选项中，选择最佳答案。

1.What does the underlined word “worlds” refer to?

A. moon    B. planets    C. fields  D. sky

2.The moon is about   kilometers away from the earth.

A.384000      B.348000    C.3840   D.3480

3.A plane can’t fly to the moon because   .

A. it’s too far away  

B.it can’t fly without air

C. there is no water on the moon

D.it is too small

4.The hot gas in the rocket is used for   .

A. cooking food for the astronauts

B. keeping the man in the rocket warm

C. making the rocket fly up

D. keeping the air in the rocket fresh

5.Rockets without men in them have reached   .

A. another star

B. the sun

C. the moon

D. other planets of the sun

Answer

1.B

2.A

3.B

4.C

5.D

【解析】

试题分析：科学家们正想方设法来探索宇宙。现在人们对月球有了更多的了解，人类也实现了登月，无人探测器已经到过月球之外的其它行星。有一天火箭可能会造访宇宙的任何地方。

1.B词意猜测题。结合下文中的句子“Some rockets without men in them have flown to other planets much farther away than the moon.”可知，worlds是指太空中的其它行星，故答案为B。

2.A 细节理解题。根据短文中的句子“The moon is about three hundred and eighty-four thousand kilometers away from the earth.”可知，月球距离地球384000公里，故答案为A。

3.B细节理解题。根据短文中的句子“A plane cannot fly to the moon because the air reaches only 240 kilometers. Then there is no air.”可知，飞机的飞行离不开空气，答案为B。

4.C细节理解题。根据短文倒数第二段中的句子可知，燃气燃烧，形成高速射流排出而产生推力，帮助火箭升空，答案为C。

5.细节理解题。根据短文最后一段中的句子“Some rockets without men in them have flown to other planets much farther away than the moon.”无人探测器已经到过其它的行星，答案D。

考点：科普类短文阅读。