单词：secure multipurpose internet mail extension
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A: I was inquiring about a bill that I never got. B: Which credit card was the bill for? A: The bill was for my Master Card. B: That bill should have been mailed about two weeks ago. A: It never came in the mail. B: My computer shows that it has alre
英语情景对话-日常生活
Part B Listen to these two conversations and check your answers. WOMAN1:Could you make me a copy of this report? MAN1:Sure. WOMAN1:Oh,and would you type this letter?It's very urgent. MAN1:I'm very busy right now.Can I type it tomorrow? WOMAN1:And som
初级剑桥商务英语
Broadcast: Jan 25,2003 Can this be a wild exaggeration? After all, the printing press 1) ushered in an entire era of intellectual advancement called the 2) Enlightenment. If you ask John Perry Barlow,
VOA2003（上）-科技先知
随着电脑走进千家万户，一张无形的巨网也悄然织起。这就是Internet（因特网，国际互联网）。一旦连接了Internet，信息传递就成为一件非常轻松惬意的事情。在网上最常使用的服务就是E－ma
英语作文
Unencrypted messages can be hijacked in transit and read or altered．If the mail is not digitally signed，you can't be sure where it came from． 未加密的信息可能在传输中被截获、偷看或窜改。如果邮件不是数字签名的，你
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Unencrypted messages can be hijacked in transit and read or altered．If the mail is not digitally signed，you can't be sure where it came from． 未加密的信息可能在传输中被截获、偷看或窜改。如果邮件不是数字签名的，你
英语阅读理解