单项选择题
A.6 B.7 C.8 D.12
A.路上绑鞋带,全程用时短 B.扶梯上绑鞋带,全程用时短 C.用时一样 D.和扶梯长度,绑鞋带具体用时有关
A.SET B.IPSEC C.SSL D.SSH
A. select *from user where A=1 and B=1 B. select *from user where 1=1 and A=1 and B=1 C. select *from user where B=1 and C=1 D. select *from user where A=1 and C=1
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