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【题目】How much does it cost to put satellite into____________

A.gasB.orbitC.chemicalsD.vapors

【答案】B

【解析】

考查名词词义辨析。句意:把卫星放入轨道要花费多少钱?A. gas气体;B. orbit轨道;C. chemicals化学物质;D. vapors水蒸气。根据 satellite可知,此处用“轨道”符合句意,故选B项。

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