The World Bank report implies that urgent action should be taken to protect water supplies.
A. Right
B. Wrong
C. Not mentioned
查看答案
查询学生姓名及其所选修课程的课程号和成绩，正确的SQL语句是
A. SELECT S.SNAME，SC.C#，GRADE FROM S WHERE S.S#=SC.S#
B. SELECT S.SNAME，SC.C#，GRADE FROM SC WHERE S.S#=SC.S#
C. SELECT S.SNAME，SC.C#，GRADE FROM S，SC WHERE S.S#=SC.S#
D. SELECT S.SNAME，SC.C#，GRADE FROM S，SC WHERE S.S#=SC.C#
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