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【单选题】有如下事件过程：Private Sub Form_Load() Show Dim Arr() As Variant Arr = Array(1, 3, 5, 7, 9, 11, 13, 15) Call converse(Arr) For i = 0 To 7 Print arr(i); Next iEnd Sub 以上程序的功能是，通过调用Converse过程，将数组Arr中的元素逆序存放并输出...
A.
Private Sub converse(dim a() as Variant ) Dim T For i = LBound(A) To UBound(A) T = a(i) a(i) = a(UBound(A) - i) a(UBound(A) - i) = T Next i End Sub
B.
Private Sub converse(dim a() as Variant) Dim T Dim J As Integer J = (LBound(A) + UBound(A)) / 2 For i = LBound(A) To J T = a(i) a(i) = a(UBound(A) - i) a(UBound(A) - i) = T Next i End Sub
C.
Private Sub converse(a() As Variant) Dim T For i = LBound(A) To UBound(A) T = a(i) a(i) = a(UBound(A) - i) a(UBound(A) - i) = T Next i End Sub
D.
Private Sub converse(a() As Variant) Dim T Dim J As Integer J = Int((LBound(A) + UBound(A)) / 2) For i = LBound(A) To J T = a(i) a(i) = a(UBound(A) - i) a(UBound(A) - i) = T Next i End Sub
【多选题】什么是环形防喷器的井压助封？
A.
在关井时，作用在活塞内腔上部环形面积上的井压向上推动活塞，促使胶芯密封更紧密，增加密封的可靠性。
B.
在关井时，作用在球形胶芯底部的环形面积上的井压向上推动胶芯，促使胶芯密封更紧密，增加密封的可靠性。
C.
在开井时，作用在活塞内腔上部环形面积上的井压向上推动活塞，促使胶芯密封更紧密，增加密封的可靠性。
D.
在开井时，作用在球形胶芯底部的环形面积上的井压向上推动胶芯，促使胶芯密封更紧密，增加密封的可靠性。