平面上心盘平面处裂纹大于（）时分解焊修。
A.300mm
B.350mm
C.400mm
D.500mm
参考答案：C
— How about________Christmas evening party?
— I should say it was________success. [ ]
A. a; a
B. the; /
C. a; /
D. the; a
煤气站的水煤气和半水煤气的含氧量达到()时必须停炉。
A．0.1%
B．0.5%
C．1%
D．1.5%
