设在工程中定义了如下类型： Type stutype ino As Integer strname As String*20 strsex As String* 1 smark As Single End Type在窗体上正确使用这个类型的是下列哪个操作( )。

A．Sub Commandl_Click0 Dim student As Stutype With student .ino = 12 . strname = smith .strsex = .smark = 89 End With End Sub

B．Sub Commandl_Click0 Dim student As Stutype With student .ino = 12 .strname = "smith" .strscx = "男" .smark = 89 End With End Sub

C．Sub Commandl_Click0 Dim student As Stutype With Stutype ino = 12 .strname = "smith" .strsex = "男" .smark = 89 End With End Sub

D．Sub Command1 _Click() Dim student As Stutype With student .ino = 12 .strname = "smith" .strsex = "男" .smark = 89 End student End Sub

制备速释固体分散体的载体材料是（）

A．明胶

B．环糊精

C．聚乙烯醇

D．PVP

E．EC