A. It makes people think of kindness, frailty, old fashion, etc. B. The word has different associations for different people. C. The word brings a sense of security to children. D. The word means an impediment to real researc 参考答案:B
第22题: [单项选择]设S(S#，SNAME)、SC(S#，C#，G)分别为学生关系和选课关系，现要查询选修C2课程(C#)，且成绩为B以上(含B)的学生及成绩(C)，相应的SQL语句是： SELECT S. *，SC. G FROM S，SC WHERE S.S#=SC. S# AND SC. C#='C2'AND______。 参考答案:A 答案解析:[分析] 因为要查询C2成绩大于等于B的学生及成绩，故为SC. G＞='B'。
