动车组公布票价打折时，在票面打印“（）”字。
A、折二
B、折
C、折扣
D、折一
参考答案：B
Millions of pounds' worth of damage _________ by a storm which swept across the north of
England last night. [ ]
A. had been caused
B. has been caused
C. will be caused
D. will have been caused
缺乏细胞壁的原核细胞型微生物是（）
A．衣原体
B．病毒
C．支原体
D．螺旋体
E．真菌
