避孕方法中成功率最高的是
A．安全期避孕B．使用 * * 隔膜C．使用阴茎套D．放置宫内节育器E．按时口服短效避孕药
参考答案：E
—You part in the party in time.
—Sorry，I was delayed by the accident.
A．are supposed to take
B．have supposed to take
C．are supposed to have taken
D．supposed to take
现代网络中应用最为广泛的的网络通信协议是TCP/IP协议（）。
