已知有下面过程Private Sub proc1(a As Integer,b As String,Optional x As Boolean)End Sub正确调用此过程的语句是【 】

A．Call proc1(5)

B．Call proc1 5," abe ",False

C．proc1(12,"abe",True)

D．proc15,"abe"

下列关于玻璃离子粘固剂的描述错误的是（）

A.对牙髓刺激性小

B.封闭性能好

C.可释放氟

D.可用于乳牙各类洞修复

E.耐磨性好