A.ICAO
B.IATA
C.CAAC
D.CCAR
A.输出val is NULL
B.输出val is not NULL
C.语法错误
D.运行时出现异常
非必需氨基酸为()。
A.Trp、Phe
B.Leu、Ile
C.Thr、Val
D.Lys、Met
E.Glu、Asp
镰刀状红细胞性贫血患者,Hb分子中氨基酸的替换及位置是()。
A.α-链第六位Val换成Glu
B.β-链第六位Val换成Glu
C.α-链第六位Glu换成Val
D.β-链第六位Glu换成Val
在窗体上画一个命令按钮Command1,然后编写如下程序: Private Sub Command1_Click() Dim arr()As Integer ReDim arr(3) For i=0 To 3 arr(i)=i Next i x=InputBox("请输入一个数字:") If Val(x)>4 Then ReDim art(4) air(4)=x End If Me.Print(arr(4)-art(3)) End Sub 程序运行后,单击命令按钮,在输入对话框中输入12,输出结果为【 】。
Private Sub Command1_Click() Dim x As Long, y As Long,i As Long x=Val(Text1.Text) y=Val(TextText) TextText = Str(【 】) End Sub Function fun1(a As Long,b As Long)As Long Dim r As Long Dim t As Long If【 】Then t = a a = b b = t End If r = a Mod b Do While r <> 0 a = b b = r r = a Mod b Loop 【 】 End Function