Scientist are not sure about the ___________ of water on the Mars.A.occupationB.existenceC.demandD.t

题目简介

Scientist are not sure about the ___________ of water on the Mars.A.occupationB.existenceC.demandD.t

题目详情

Scientist are not sure about the ___________ of water on the Mars.
A.occupationB.existenceC.demandD.treasure
题型:单选题难度:中档来源:不详

答案

B
词义辨析。occupation 职业,占有;existence存在,生存;demand要求,需要;treasure财富,财宝。句意:关于火星上水的存在科学家们不确定。选B。

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