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【单选题】
绕Z轴旋转的旋转坐标是( )。A.
C
B.
A
C.
D
D.
B
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举一反三
【单选题】The book is borrowed from the library, so you ______ your children put dots and lines here and there.
A.
should have left
B.
ought not to have let
C.
needn't have let
D.
mustn't have let
【简答题】Where does your food come from? How is it made? These days, many people worry about food safety. But food safety is not a new worry. In 1906, Upton Sinclair wrote the Jungle. The book is the story of ...
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