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问题 选择题

　　下面是旅居台湾的孔子第77代嫡传孙孔德成写给在大陆的二姐的对联中的上联，请为它选填下联。[ ]

上联：风雨一杯酒  　　

下联：_____________   　

A．天涯共此时

B．羁危万里身

C．江山万里心

D．千里共婵娟

答案

答案：C

单项选择题

Melissa and Love Letter made use of the trust that exists between friends or colleagues.　Imagine receiving an (71) from a friend who asks you to open it.　This is what happens with Melissa and several other similar email (72) .Upon　running ,such worms usually proceed to send themselves out to email addresses from the victim’s address book, previous emails, web pages (73) .

　　As administrators seek to block dangerous email attachments through the recognition of well-known (74) ,virus writers use other extensions to circumvent such protection.　Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still run and successfully infect target users.

　　Frequently ,hackers try to penetrate networks by sending an attachment that looks like a flash movie ,which, while displaying some cute animation ,simultaneously runs commands in the background to steal your passwords and give the (75) access to your network.

75（）

A．cracker　　

B．user　

C．customer　

D．client
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单项选择题

静变流机电流的特点是：

A、26/115V、三相、变频交流电

B、26/115V、单相、变频交流电

C、26/115V、三相、400HZ 交流电

D、26/115V、单相、400HZ 交流电
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