影响固体介质击穿电压的主要因素有电压作用时间、电场均匀程度、温度、累积效应等
参考答案:对
以下因素中,对内分泌功能影响最大的是()。
A.局部麻醉
B.神经阻滞
C.使用静脉麻醉药
D.使用吸入麻醉药
E.手术
Pharming is a scamming practice in which malicious code is installed on a personal computer or server, misdirecting users to (71) fraudulent Web sites without their knowledge or consent. Pharming has been called "phishing without a lure".
In phishing, the perpetrator sends out legitimate- (72) 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 (73) 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 (74) bookmark entry. Some spyware removal programs can correct the corruption, but it frequently recurs unless the user changes browsing. (75) habits,
(75)是()
A. habits signature
B. site
C. rages
D. address