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问题 单项选择题 A2型题

女性，24岁。主诉：用牙线清洁牙齿时牙龈有时出血。检查：牙龈 * * 轻度充血、水肿，PD2～3mm，未及附着丧失。此患者最可能的诊断是（）。

A.边缘性龈炎

B.牙间 * * 炎

C.青春期龈炎

D.青少年牙周炎

E.急性坏死性龈炎

答案

参考答案：A

单项选择题

Melissa and Love Letter made use of the trust that exists between friends or colleagues. Imagine receiving an (66) from a friend who asks you to open it. This is what happens with Melissa and several other similar email (67) . Upon running, such worms usually proceed to send themselves out to email addresses from the victim’ s address book ,previous emails, web pages (68) .
As administrators seek to block dangerous email attachments through the recognition of well- known (69) , virus writers use other extensions to circumvent such protection. Executable (.exe) files are renamed to . bat and . cnd 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 (70) access to your network.

A．cracker

B．user

C．customer

D．client
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单项选择题

政府提供的绝大部分公 * * 品和服务是面向整个社会的，( )都可以享用政府通过财政支出提供的公 * * 品和服务。

A．合法公民
B．成年公民
C．本国公民
D．全社会成员
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