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【多选题】
在进行电子签名验证时，可以用下列哪几种方法来验证证书的真实性。（）A.
到证书验证中心检验
B.
与同一用户在相同时间段内所作的对其他电子文件签名的证书进行比较
C.
使用储存在电子文件保存系统安全*区中的一个证书拷贝
D.
访问证书管理机构（CA）证书服务器
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Jeremy Fox, a retired businessman in a small city in England, recently bought an old farmhouse with a yard and a small field, some five miles out of the town. There he planned to lead a simple life wi...
A.
greatly annoyed at MT. Fox's enthusiasm
B.
very much interested in the discovery
C.
uncertain of Mr. Fox' s enthusiasm
D.
curious about Mr. Fox's findings
【单选题】It is unbelievable that Mr. Lucas leads a simple life __his great wealth.
A.
without
B.
despite
C.
in
D.
to
【单选题】I went to New York City. But I bought_____ for myself because _____there was very expensive.
A.
something, anything
B.
nothing, everything
C.
nothing, something
D.
anything, everything
【简答题】（2）结合材料二，运用经济生活知识，分别阐明表4中三种税收政策的调整对我国经济发展的积极意义。（8分）
【简答题】社会经济生活知识包括[填空(1)] [填空(2)] [填空(3)]A. 劳动和利益关系B. 市场和买卖关系C. 货币和理财关系
【单选题】Which of the following may NOT be bought in Highwoods Book City?
A.
Maps and newspapers
B.
Fashion magazines
C.
Health books
D.
Short novels
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