.A rocket is pushed up into the air when.A.hot ga
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.A rocket is pushed up into the air when.
A.hot gas rushes out of its head
B.it is powered by gas
C.hot gas rushes out of its bottom
D.hot gas rushes out of its neck
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答案:C
根据第六段最后一句可知,当热气从火箭尾部冲出时,火箭被送人空中。C项中的“itsbottom”是第六段最后一句中的“the end of the rocket”的同义转换。
