目前诊断中应除外
A．低钾血症
B．低钠血症
C．休克
D．呼吸性碱中毒
E．代谢性碱中毒
参考答案：E
已知全集U=R，集合A={x|x2-2x-3＞0}，B={x|2＜x＜4}，那么集合（CUA）∩B=[ ]
A．{x|-1≤x≤4}
B．{x|2＜x≤3}
C．{x|2≤x＜3}
D．{x|-1＜x＜4}
My school is near my home, so I _______ to catch a bus.[ ]
A. needs not
B. don't need
C. needn't
D. not need
