由带班人带领，防护员防护，沿路肩集中行走时，前后相距不大于（）。
A.20m
B.50m
C.100m
D.150m
参考答案：C
— Why do you think the film star is getting less popular?
— I guess the way she wears is ______ annoys her fans most. [ ]
A. which
B. where
C. how
D. what
应进一步询问母亲的最重要的病史是
A．异常分娩史
B．感染史
C．用药史
D．吸毒史
E．营养情况
