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问题 单项选择题

建设工程项目的全寿命周期包括( )。

A．决策阶段、实施阶段和使用阶段
B．设计阶段、招标阶段和施工阶段
C．设计阶段、施工阶段和使用阶段
D．可行性研究阶段、设计阶段和施工阶段

答案

参考答案：A

问答题 简答题

肌钙蛋白（cTn）
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单项选择题

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

A．names B．cookies C．software D．extensions

As administrators seek to block dangerous email attachments through the recognition ofwell—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 wilt still runand 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，simultaneouslyruns commands in the background to steal your passwords and give the (75) access to yournetwork．
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