制定定额的方法主要()
A.有经验法、统计法、写实法
B.有经验法、统计法
C.统计法、写实法
D.有经验法写实法
参考答案:A
-----Where are the children? Professor Zhang has come and his speech will start soon.
------I wish they always late.
A. hadn’t been C. wouldn’t be D. wouldn’t have been D. weren’t
主风分成()股进入再生器。