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问题 单项选择题 B1型题

关节沿矢状轴进行的运动（）

A.环转运动

B.内收和外展

C.旋内和旋外

D.屈和伸

E.滑动

答案

参考答案：B

选择题
—You will never believe that it took us two hours to get to the restaurant.
—Really? You ________ in a traffic jam.
A．needn't have got stuckB．couldn't have got stuck
C．must have got stuckD．should have got stuck
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单项选择题

Ⅲ类地表水环境COD和BOD，标准限值是( )。

A．20mg/L和6mg/L
B．20mg/L和4mg/L
C．15mg/L和3mg/L
D．15mg/L和4mg/L
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