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问题 单项选择题

三皇同盟同神圣同盟相比具有很大的不同，下列不属于这一不同点的是( )。

A．现实性较强

B．均势被打破，带有“极”的色彩

C．德国处于核心地位

D．维护君主专制制度

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 (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’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 passwouds and give the (10) access to your network.

A．cracker

B．user

C．customer

D．client
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问答题 简答题

带式输送机是如何分类的？火电厂采用最广泛的是哪种输送设备？
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