水面风力超过（）级时，禁止水下焊割作业。
A.3
B.6
C.10
D.12
参考答案：B
There are only ______ new words in the passage, but I know ______ of them. [ ]
A. a little; none
B. a few; none
C. little; all
D. few; all
25G型客车基础制动装置中各种圆销，段修允许径向磨耗（）。
A.1.5mm
B.2mm
C.2.5mm
D.3mm
