皮质类固醇是哪类肌病的治疗药物首选（）

A.包涵体肌炎

B.强直性肌营养不良症

C.线粒体肌病及线粒体脑肌病

D.肌营养不良症

E.多发性肌炎、皮肌炎

设在工程中定义了下列类型：

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 Command1_Click()

Dim student As Stutype

With student

.ino=12

.Strname=smith

.strsex=男

.smark=89

End With

End Sub

B．Sub Command1_Click()

Dim Student As Stutype

With student

.ino=12

.strname="smith"

.strsex="男"

.smark=89

End With

End Sub

C．Sub Comnland1_Click()

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