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问题 选择题

下列关于魏晋、南朝时期江南经济得以发展的原因，说法不正确的是[ ]

A．江南有优越的自然条件

B．江南社会秩序比较安定

C．北方人口大量南迁

D．江南有先进的生产技术

答案

答案：D

单项选择题

Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an (6) from a friend who asks you to open it. This is what happens with Melissa and several other similar email (7) . Upon running, such worms usually proceed to send themselves out to email addresses from the victim’s address book, previous emails, web pages (8) .

As administrators seek to block dangerous email attachments through the recognition of well-known (9) , 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 (10) access to your network.

6（）

A.attachment

B.packet

C.datagram

D.message
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判断题

在缅甸，老虎、缅甸蟒、大象等野生动物是受法律保护的，不要购买受保护的野生动物及其制品。
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