轿壁的机械强度试验是在5C.m的面积上，施加（）N均匀分布力，其弹性变形不大于15mm
A.1000
B.400
C.300
D.200
参考答案：C
黄水疮相当于西医的
A．银屑病B．单纯疱疹C．玫瑰疱疹D．荨麻疹E．脓疱疮
Our neighbor's car alarm is always _____ in the middle of the night. [ ]
A. going out
B. going off
C. going away
D. going down
