单项选择题

下面有关注释语句的格式,错误的是

A.Rem注释内容
B.'注释内容
C.a=3:b=2'对a、b赋值
D.Private Sub Command1_MouseDown(button As Integer,shift As Integer,_Rein鼠标按下事件的命令调用过程x As Single,Y As Singl