下列语句中正确的是()表score(sti_id,names,math,English,VB)

A:selectstu_id,sum(math)froms core B:selectsum(math),avg(VB)from score C:select*,sum(english)from score D:delete * from score

删除仓库关系中仓库号值为WH2的元组,应使用命令( )。

A:DELETE FROM 仓库 WHERE 仓库号=“WH2” B:DROP FROM 仓库 WHERE 仓库号=“WH2” C:DELETE 仓库 WHERE 仓库号=“WH2” D:DROP FROM 仓库 WHERE 仓库号=WH2

下列程序段的执行结果为  a=75  If a > 60 Then Score=1  If a > 70 Then Score=2  If a > 80 Then Score=3  If a > 90 Then Score=4  Print "Score= ";Score

A:Score=1 B:Score=2 C:Score=3 D:Score=4

删除仓库关系中仓库号值为WH2的元组,应使用命令

A:DELETE FROM 仓库 WHERE 仓库号=“WH2” B:DROP FROM 仓库 WHERE 仓库号=“WH2” C:DELETE 仓库 WHERE 仓库号=“WH2” D:DROP FROM 仓库 WHERE 仓库号=WH2

下列程序段的执行结果为( )。   a=75   If a > 60 Then Score=1   If a > 70 Then Score=2   If a > 80 Then Score=3   If a > 90 Then Score=4   Print "Score= ";Score

A:Score=1 B:Score=2 C:Score=3 D:Score=4

下列程序段的执行结果为  a=75  If a > 60 Then Score=1  If a > 70 Then Score=2  If a > 80 Then Score=3  If a > 90 Then Score=4  Print "Score= ";Score

A:Score=1 B:Score=2 C:Score=3 D:Score=4

下列程序段的执行结果为( )。   a=75   If a > 60 Then Score=1   If a > 70 Then Score=2   If a > 80 Then Score=3   If a > 90 Then Score=4   Print "Score= ";Score

A:Score=1 B:Score=2 C:Score=3 D:Score=4

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