Rockets with one stage are called step rockets. [ ] A．better thanB．farther than C．longer thanD．more than 题目和参考答案——青夏教育精英家教网—

题目内容

Rockets with ________ one stage are called step rockets.

[　　]

A．better than

B．farther than

C．longer than

D．more than

答案：D
提示：

四个选项均为比较级形容词构成的短语，A、B、C、D项的短语意思分别为“好于”、“远于”、“长于”、“多于”.根据航天常识可知这句意为“多于一级的火箭称为多级火箭”.

练习册系列答案

强力推荐精品教辅高中新课标快乐假期寒系列答案

起跑线系列丛书新课标寒假作业系列答案

期末寒假一本通系列答案

期末寒假衔接快乐驿站假期作业新疆青少年出版社系列答案

期末寒假提优计划系列答案

期末寒假大串联黄山书社系列答案

金牌教辅假期快乐练培优寒假作业系列答案

仁爱英语开心寒假系列答案

名题文化步步高书系寒假作业武汉出版社系列答案

Happy寒假作业快乐寒假系列答案

相关题目

Thousands of rockets _______ with chemicals were fired into the sky to create the beautiful scenes in the Asian Games．

A. load B. loaded　　　　　　　　　　 C. loading D. to load

Thousands of rockets ______ with chemicals were fired into the sky to create the beautiful scenes in the Asian Games .

A. load B. loaded C. loading D. to load

Scientists have always wanted to know more about the other worlds in space. They have looked at them 1 the telescope and 2 this way they have found out 3 . They know, for example, many facts about the moon.

The moon is about 384,000 kilometers 4 the earth . A plane can not fly to the moon because there isn’t enough air. But a rocket can fly even when there is no air .

“How does a rocket fly ?” If you want to know, get a balloon and 5 blow it up 6 it is quite big. Do not 7 the neck of the balloon. Let it go 8 and see 9 happens. The balloon 10 through the air very quickly. The air inside the balloon 11 out. It rushes out through the 12 balloon and this pushes the balloon through the air. It does not need wings 13 .

This is 14 a rocket 15 . It is not made of rubber like a balloon, of course . It is made of metal. The metal 16 not be heavy 17 it must be very strong. A gas is put inside the rocket. When the gas is hot enough , it rushes out of the open end of the rocket , and pushes it 18 the air.

Rockets can fly far out into space . Rockets with men inside them have already 19 the moon . Someday rockets may be able to go 20 in space .

1．A．through B．towards C．across D．into

2．A．at B．up C．in D．by

3．A．a lot of B．lots of C．a great deal of D．a great deal

4．A．away far B．away from C．far from D．far to

5．A．then B．first C．at last D．last

6．A．when B．while C．until D．as

7．A．tie up B．take up C．put up D．hold up

8．A．carefully B．slowly C．suddenly D．quickly

9．A．that B．what C．which D．whether

10．A．go up B．going up C．will fly off D．flying off

11．A．try to get B．trying to get C．tried to get D．tries to get

12．A．neck B．body C．mouth D．nose

13．A．to fly B．flying C．its own D．of it

14．A．what B．how C．when D．where

15．A．runs B．goes C．works D．flies

16．A．shall B．may C．can D．must

17．A．but B．and C．so D．therefore

18．A．in B．into C．from D．towards

19．A．got B．arrived C．reached D．reached

20．A．anywhere B．everywhere C．somewhere D．nowhere

Scientists have always wanted to know more about the universe. Years ago they knew many things about the moon. They knew how big it was and how far away from the earth. But they wanted to know more about it. They thought the best way was to send men to the moon. The moon is about 384, 000 kilometres away from the earth. A plane cannot fly to the moon because the air reaches only 240 kilometres away from the earth. But something can fly even when there is no air. That is a rocket（火箭）.
　 How does a rocket fly? There is gas（气体）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 out into space. Rockets with men in them have been to the moon. Several rockets without men in them have flown to another planet（行星）much farther away than the moon. One day rockets may be able to go to any place in space.
1. Scientists have known ______ the moon is.
A. how long B. how heavy C. how old D. how big
2. The earth is about 384, 000 kilometres away from the ______.
A. space B. universe C. sun D. moon
3. A plane cannot fly to the moon because ______.
A. there is no air above 240 kilometres away from the earth
B. there is no gas in the plane
C. the plane is not strong enough
D. the plane must be driven by a man
4. The hot gas in the rocket is used for ______.
A. keeping the air in the rocket fresh（新鲜的）
B. keeping the men in the rocket warm
C. making the rocket fly up
D. cooking food for the men
5. Several rockets without men in them have flown to ______.
A. the stars B. the satellites of the sun
C. the sun D. another satellite of the sun

试题分类