悬式绝缘子接地侧裙边距接地体的距离不小于（）mm
A.100
B.400
C.150
D.300
参考答案：C
— Does your friend live in Beijing?
— _______________ [ ]
A. Yes, he doesn't.
B. No, he does.
C. Yes, he does.
引起梅毒的病原体是（）
A.真菌
B.螺旋体
C.细菌
D.衣原体
E.支原体
