失败率最低的避孕方法是()
A．避孕套
B．宫内节育器
C．按规定口服避孕药
D． * * 隔膜
E．安全期避孕
参考答案：C
Written in a hurry,____. How can it be satisfactory? [ ]
A. they find many mistakes in the report
B. lots of mistakes have been made in the report
C. there are plenty of mistakes in the report
D. the report is full of mistakes
简述电子支付与传统支付的区别。
