2. 职称英语
  3. The rocket engine, with its steady roar like that of a waterfall or a thunde

The rocket engine, with its steady roar like that of a waterfall or a thunde

游客2025-03-14  20
问题     The rocket engine, with its steady roar like that of a waterfall or a thunderstorm, is an impressive symbol of the new space age. Rocket engines have【76】powerful enough to shoot astronauts【77】the earth’s gravitational pull and【78】them on the moon. We have now become【79】in space.
    Impressive and complex【80】it may appear,  the rocket, which was【81】in China over 800 years【82】, is a relatively simple device. Fuel that is【83】in the rocket engine changes【84】gas. The hot and rapidly【85】gas must escape, but it can do so only through an opening that faces backward. As the gas is radiated with great force, it pushes the rocket in the opposite direction. [br]
选项 A、heating
B、escaping
C、expanding
D、conducting
答案 C
解析 根据句子意思判断，应选expanding gas“膨胀的气体”。
转载请注明原文地址:https://tihaiku.com/zcyy/3996428.html
相关试题推荐
随机试题
最新回复(0)