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问题 选择题

Schools across China are expected to hire 50000 college graduates this year as short-term

teachers , ________ reduce unemployment pressures. [ ]

A. help          

B. to have helped        

C. to help        

D. having helped

答案

答案：C

单项选择题

Pharming is a scamming practice in which malicious code is installed on a personal computer or server, misdirecting users to (1) fraudulent Web sites without their knowledge or consent. Pharming has been called "phishing without a lure".

In phishing, the perpetrator sends out legitimate- (2) looking e-malls, appearing to come from some of the Web’s most popular sites, in an effort to obtain personal and financial information from individual recipients. But in pharming, larger numbers of computer users can be (3) victimized because it is not necessary to target individuals one by one and no conscious action is required on the part of the victim. In one form of pharming attack, code sent in an e-mail modifies local host files on a personal computer. The host files convert URLs into the number strings that the computer uses to access Web sites. A computer with a compromised host file will go to the fake Web site even if a user types in the correct Internet address or clicks on an affected (4) bookmark entry. Some spyware removal programs can correct the corruption, but it frequently recurs unless the user changes browsing. (5) habits,

5（）

A．habits signature

B．site

C．rages

D．address
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单项选择题

产生X线的必备条件是

A．电子源
B．高速电子流
C．阳极靶面
D．以上都是
E．以上都不是
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