________, I saw and old friend of mine,_爱下问搜题

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问题选择题

________, I saw and old friend of mine, whom I haven’t seen for years.

A．Turning around

B．Turning back

C．Turning away

D．Turning up

答案

答案：A

选择题

If by any chance someone comes to see me , ask them to leave a _____.

A．letter

B．notice

C．message

D．sentence

单项选择题

在公钥密码体制中，不公开的是（）。　　Ⅰ．公钥　　Ⅱ．私钥　　Ⅲ．加密算法

A． Ⅰ

B． Ⅱ

C． Ⅰ和Ⅱ

D． Ⅱ和Ⅲ