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举一反三
【单选题】蛋白质的等电点是指（）
A.
蛋白质溶液的pH值等于7时溶液的pH值
B.
蛋白质溶液的pH值等于7.4时溶液的pH值
C.
蛋白质分子呈正离子状态时溶液的pH值
D.
蛋白质分子呈负离子状态时溶液的pH值
E.
蛋白质分子的正电荷与负电荷相等时溶液的pH值
【单选题】A．肾小球滤过率＜25ml／min，血肌酐＞450μmol／L但＜707μmo1／LB．肾小球滤过率＜50m1／min，血肌酐＜450μmol／LC．肾小球滤过率＜80ml／min，血肌酐＜132．6μmol／LD．肾小球滤过率＜10ml／min，血肌酐＞707μmol／L 慢性肾衰竭肾衰竭期是
A.
A．
B.
B．
C.
C．
D.
D．
【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
【单选题】合并糖尿病的高血压者，血清肌酐正常，降压治方首选的药物是（）
A.
噻嗪类利尿剂
B.
α受体阻滞剂
C.
血管紧张素转换酶抑制剂
D.
二氢吡啶类钙通道阻滞剂
E.
β受体阻滞剂