机车信号机应该安装在什么地方？

己看完的页数和剩下的页数不成比例．______．

Out of the crowded bus _____, who was wearing a pair of dark glasses. [ ]

A. stepped a tall man in his thirties

B. a tall man in his thirties stepped

C. did a tall man step in his thirties

D. did a tall man in his thirties step

民主测评、个别谈话总体评价"优秀"得票率低于（）的，不能评为优秀领导干部。

A.70%

B.75%

C.80%

D.85%

油气井的完井方法主要是由油气层的（）及（）决定的。

斯屯托耳(Stentor)