幽门梗阻下列术前准备措施中哪一项是错误的()。
A.术前3天胃肠减压
B.纠正贫血、低蛋白
C.纠正脱水
D.用温水洗胃3天
E.纠正低氯低钾性碱中毒
参考答案:D
晶体中()是按一定规律排列的。
Not until yesterday ( ) your payment.
A.have we received
B.had we received
C.did we receive
D.we have received