安全指标是指在一定的条件下,一个生产系统,在完成其功能的过程中,所产生的事故损失的可接受水平.
参考答案:对
中国不允许发行无面额股票。()
--I am wondering how to find the newly-built theater.
--Go straight two blocks. You__________miss it, for it's a white building like a huge castle.
A.can't
B.mustn't
C.shan't
D.needn't