服用口服紧急避孕药的最佳时间是（）
A.120～240小时内
B.5～7天内
C.72～120小时以内
D.5天以后
E.72小时以内
参考答案：E
It discusses the major economic, institutional social and geographical ______ that need to be addressed in the appropriate introduction and use of this technology.
A．fronts
B．comments
C．facts
D．aspects
期望质量
