“电子商务系统应提供交易双方的身份鉴别机制,确保交易各方无法否认已经完成的交易”体现的电子商务安全要素是
A.完整性
B.有效性
C.不可抵赖性
D.保密性
正确答案是C
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The traditional method of food drying is to put it in places through which hot air is blown at temperature of about 110°C at entry to about 43°C at exit. This is the usual method for drying such things as vegetables, meat and