resume( )方法负责恢复被( )方法挂起的线程。
A．stop( )
B．sleep( )
C．wait( )
D．suspend( )
参考答案：D
—______ I leave all the books here?
—Sorry, you can't. You have to take them back home. [ ]
A. Need
B. Must
C. May
D. Should
同轴度属于（）。
A.跳动位置公差
B.定向位置公差
C.形状公差
D.定位位置公差
