第5题: [单项选择]在公钥密码体系中，不可以公开的是______。 A. 公钥 B. 公钥和加密算法 C. 私钥 D. 私钥和加密算法 参考答案:C 答案解析:[解析] 公钥加密体制有两个不同的密钥，可将加密功能和解密功能分开。一个密钥称为私钥，被秘密保存。另一个密钥称为公钥，不需要保密。公钥加密的加密算法和公钥都是公开的。
第7题: [填空题]A they are useless B in paper chase C that it is easily reached D that different people have different requirements E they are not comfortable F in investing in coupons
You can put your file cart anywhere you like, on condition______ 参考答案:C 答案解析:[解析] 借助句子句意判断选项C(你可以把你的文件推车放在任何你喜欢放置的地方，只要它易被伸手触及)最合适。该题也可以借助file cart作为答案线索，找到答案相关句。根据答案相关句的内容可知“手推
第25题: [单项选择]Suddenly, Gallup’s name was (on everyone’s lips); not only (he was) the prophet of the moment, (but) it was generally believed that he had founded (a new) and most important method of prediction. A. on everyone’s lips B. he was C. but D. a new 参考答案:B 答案解析:改为was he。句首为not only时要用倒装语序。该句大意为：盖洛普民意测验(Gallup poll)创建了(founded)一种新的、十分重要的预言预测方式。
