Almost all coral reefs may disappear in 100 years.
A. Right
B. Wrong
C. Not mentioned
查看答案
The World Bank report implies that urgent action should be taken to protect water supplies.
A. Right
B. Wrong
C. Not mentioned
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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