题目内容
Air is ________ and no smell but we can feel its motion when there is a wind．
[ ]
A．
unavoidable
B．
unavailable
C．
inaccessible
D．
invisible
答案：D
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题目内容
Air is ________ and no smell but we can feel its motion when there is a wind．
unavoidable
unavailable
inaccessible
invisible