题目内容

社会工作者在助人过程中要居于主动的、支配的地位，即要对受助者进行控制

A. 对
B. 错

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设SC表中记录成绩的列为：Grade，类型为int。若在查询成绩时，希望将成绩按‘优’、‘良’、‘中’、‘及格’和‘不及格’形式显示，正确的Case表达式是( )

A. Case GradeWhen 90~100 THEN '优'When 80~89 THEN '良'When 70~79 THEN '中'When 60~69 THEN '及格'Else '不及格'End
B. CaseWhen Grade between 90 and 100 THEN Grade = '优'When Grade between 80 and 89 THEN Grade = '良'When Grade between 70 and 79 THEN Grade = '中'When Grade between 60 and 69 THEN Grade = '及格'Else Grade = '不及格'End
CaseWhen Grade between 90 and 100 THEN '优'When Grade between 80 and 89 THEN '良'When Grade between 70 and 79 THEN '中'When Grade between 60 and 69 THEN '及格'Else '不及格'End
D. Case GradeWhen 90~100 THEN Grade = '优'When 80~89 THEN Grade = '良'When 70~79 THEN Grade = '中'When 60~69 THEN Grade = '及格'Else Grade = '不及格'End

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