最佳检查时间
A．月经前3～7天B．月经周期3～7天C．排卵后7～8天D．两次月经中间E．月经干净后3～7天
参考答案：E
Many local people in Leshan prefer to go to _____in Mount Emei for their summer holiday.[ ]
A. somewhere cold
B. cold somewhere
C. somewhere cool
D. cool somewhere
医院感染和医源性感染有哪些不同？
