皮皮学，免费搜题
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【单选题】
皮数杆是用它来控制每皮砖厚度,其间距不应大于()。A.
5 m
B.
15 m
C.
25 m
D.
40m
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皮皮学刷刷变学霸
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【简答题】接待多方来访者要注意待客有序。()
【单选题】听力原文：W: Did you know that every day hundreds of mice and other laboratory animals are killed for experimental purposes? M: Yes. I do believe all drugs should be tested, though I myself wouldn't want t...
A.
He thinks it is ridiculous.
B.
He thinks it is a crime.
C.
He is not concerned.
D.
He thinks ill is necessary.