A.She will do the jobs for him.
B.She will inform. him of what he missed.
C.She will inform. him of the dates.
D.She doesn't think they have been doing that much to be concerned.
第9题
蜗杆传动是通过蜗杆和蜗轮实现的,通常蜗杆传动是以()为主动件
A.蜗轮
B.蜗杆
C.蜗轮或蜗杆
D.以上都不对
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