题目内容
2.听第7段材料,回答第8、9题.8.What are the speakers mainly talking about?
A.A research plan in space.
B.A certain product made in space.
C.A problem of making things in space.
9.Why have astronauts made the balls in space?
A.To produce them cheaply.
B.To keep them smaller in size.
C.To make them perfectly round.
分析 略
解答 BC
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