幽门梗阻患者术前准备中，错误的是（）
A.纠正低氯血症
B.纠正低钠血症
C.纠正低钾血症
D.纠正代谢性碱中毒
E.纠正缺水状态
参考答案：B
下列程序段的执行结果为()。 a=5 For k=1 To 0 a=a * k Next k Print k；a
A． -1 6
B． -1 16
C．1 5
D．11 21
35．Fortunately we had a compass, without________we would have got lost.
A．which
B．it
C．that
D．what
