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问题 填空题

一座城市地图中两地图上距离为10cm，表示实际距离30km，该幅地图的比例尺是______．

答案

因为，30km=3000000cm，

所以，10cm：3000000cm=1：300000；

故答案为：1：300000．

单项选择题

休温在39℃以上，每日波动2℃，此热型是( )

A．稽留热

B．间歇热

C．弛张热

D．波状热

E．不规则热
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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.

（75）处填（）。

A．cracker

B．user

C．customer

D．client
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