对天气状况的描述，正确的一项是[ ]

A．今天下这么大的雨，明天肯定还有雨

B．刚才天晴得好好的，突然狂风暴雨，真是“天有不测风云”

C．今年夏季天气多云到暴雨

D．我们这里天气这么晴朗，北京也一定是晴天

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，哪一个是错误的？

A．SELECT S#，SNAME FROM S WHERE S# = (SELECT SS# FROM SC WHERE C# = 'C2' )

B．SELECT S#，SNAME FROM S，SCWHERE S# = SS# AND C# = 'C2'

C．SELECT S#，SNAME FROM S，SC WHERE S# = SS# AND C# = 'C2' ORDER BY S#

D．SELECT S#，SNAME FROM S WHERE S# IN (SELECT SS# FROM SC WHERE C# ='C2' )