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问题 单项选择题

在全面展开扑救以前，灭火指挥者应注意的事项中，不正确的是：

A、搜索与救助，查明被困人员、火灾类型及地点

B、对火场周围进行冷却，防止火势蔓延，使灭火人员靠近火场灭火

C、对通风实施管制

D、亲自探火，以能掌握第一手材料

答案

参考答案：D

单项选择题

Melissa and LoveLetter made use of the trust that exists between friends or colleagues.Imagine receiving an （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.

（71）处填（）。

A．attachment

B．packet

C．datagram

D．message
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填空题

张家口是解放战争时期我军解放的第一座大中城市，曾作为晋察冀边区党政军机关所在地，被誉为“（）”。
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