主要运输线路直线段轨距要求上偏差为()。
A.+2㎜
B.+3㎜
C.+5㎜
D.+10㎜
参考答案:C
The situation is improving, but we are not out of the woods yet. What's the meaning of "the woods" in the
sentence. [ ]
A. order
B. danger
C. forest
D. question
因特网E—mail服务的中文名称是()。
A.电子邮件
B.网上交谈
C.网上浏览
D.网络下