A.a和b均是字符型變量 B.a是字符型變量,b是數(shù)值型變量 C.a是數(shù)值型變量,b是字符型變量 D.a和b均是數(shù)值型變量
A.5 B.10 C.20 D.10或20
A.Command1.Text=“end” B.Command1.Caption=“end” C.Command1.Name=end D.Command1.Caption=end