What's the matter?[ ]
A. She is six.
B. She is a girl.
C. She cut her finger.
答案:C
与化学因素相比,生产环境中的物理性有害因素都有哪些特点?
resume( )方法负责恢复被哪个方法挂起的线程
A.stop( )
B.sleep( )
C.wait( )
D.suspend( )