鸡毒支原体能够垂直传播也能水平传播。
参考答案：错
— I'd like to be on my own for a while. Do you mind?
— ________. Go ahead.[ ]
A. Not in the least
B. No way
C. Yes, of course
D. I'm afraid so
处方的有效期限一般为
A．当日B．3天C．5天D．7天E．14天
