我国常规化学、临床血液学室间质量评价活动的可接受成绩为
A．≥90％
B．≤90％
C．≥80％
D．≤80％
E．100％
参考答案：C
Joan is _____________ sister. [ ]
A. Mary and Jack
B. Mary's and Jack's
C. Mary's and Jack
D. Mary and Jack's
怎么理解湿温中“蒙上流下”病理特点？
