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The rocket engine, with its steady roar like that of a waterfall or a thunderstorm, is an impressive symbol of the new space et engines have 1 powerful enough to shoot astronauts 2 the earth’s gravitational pull and 3 them on the have now become 4 space.
Impressive and complex 5 it may appear, the rocket, which was 6 in China over 800 years 7 , is a relatively simple that is 8 in the rocket engine changes 9 hot and rapidly 10 gas must escape, but it can do so only 11 an opening that 12 the gas is 13 with great force, it 14 the rocket in the 15 direction. Like the kick of a gun 16 it is fired, it 17 the laws of nature 18 by Sir Isaac Newton when he discovered that“ 19 every action, there is 20 equal and opposite reaction.”
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1.【答案】D
2.【答案】C
【解析】根據意思判斷，beyond意為“超出，超過”。
3.【答案】B
4.【答案】A
【解析】根據意思判斷，travelers正確.
5.【答案】C
【解析】原句是表示讓步的狀語從句，而且是一個倒裝句，故只能選C as。
6.【答案】D
【解析】根據詞的'意思區分，invented(指發明)合乎題意。
7.【答案】D
8.【答案】D
【解析】根據句子意思判斷，burned正確。
9.【答案】B
【解析】change into是固定短語，“變成”的意思。
10.【答案】C
【解析】根據句子意思判斷，應選expanding gas膨脹的氣體。
11.【答案】D
【解析】through的意思為“穿過，通過”。
12.【答案】C
【解析】faces意為“朝著”。
13.【答案】D
14.【答案】D
【解析】根據句子意思判斷，應為push“推”。
15.【答案】C
【解析】朝相反的方向，故選C。
16.【答案】B
【解析】when引導的定語從句。
17.【答案】C
【解析】根據句子意思判斷, follow在這裡是遵循的意思。
18.【答案】A
19.【答案】D
20.【答案】B
