查询选修了课程号为'C2'的学生号和姓名，若用下列SQL的SELECT语句表达时，错误的是()。
A. SELECT S.S#，SNAME FROM S WHERE S.S# =(SELECT S C.S# FROM SC WHERE C#='C2')
B. SELECT S.S#,SNAME FROM S，SC WHERE S.S#==S C.S# AND C#='C2'
C. SELECT S.S#，SNAME FROM S，SC WHERE S.S#=S C.S# AND C#='C2' ORDER BY S.S#
D. SELECT S.S#，SNAME FROM S WHERE S.S IN (SELECT SC.S## FROM SC WHERE C#='C2')
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It can be inferred from the passage that the author believes which of the following about
A. They suggest religious and symbolic meanings.
B. They do not have qualities characteristic of sculpture.
C. They are mysterious and awe-inspiring, but not beautiful.
D. They are uniquely American in style. and sensibility.
爱国主义本质上只是一种道德要求罢了。()
A. 正确
B. 错误
对加工贸易的进口料件只能保税而不能减、免税。()
A. 正确
B. 错误
CA安全认证中心的功能是(63)。
A. 发放证书，用于在电子商务交易中确认对方的身份或表明自己的身份
B. 完成协议转换，保护银行内部网络
C. 进行销售和谈判，处理用户的订单
D. 提供用户接入线路，保证线路的可靠性
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