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问题 单项选择题

我国土地利用总体规划面临的机遇是( )。

A．农用地特别是耕地保护的形势日趋严峻

B．建设用地的供需矛盾更加突出

C．统筹协调土地利用的任务相当艰巨

D．经济全球化、科技革命和产业结构升级，有利于我国转变经济发展方式，建设资源节约型社会

答案

参考答案：D

单项选择题

 Melissa and LoveLetter made use of the l:rust that exists between friends or colleagues.Imagine receiving an (1)from a friend who asks you to open it.This is what happens with Melissa and several other similar email (2).Upon running, such worms usually proceed to send themselves out to email addresses from the victim's address book, previous emails, web pages (3). As administrators seek to block dangerous email attachments through the recognition of well-known (4),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 (5)access to your network.

空白（3）处应选择（）

A.memory

B.caches

C.ports

D.registers
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判断题

调速器配压阀针杆上下串动，调速器需切手动运行。
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