术后腹部切口裂开的预防措施中,下列哪项是错误的
A.术前提高营养状况B.术中必要时作皮肤减张缝合C.术后及时处理腹胀D.咳嗽时最好取高坡卧位E.腹带作适当的腹部包扎
参考答案:D
What a nice T-shirt! How much did you_____ for it?
It_____ me twenty yuan.
A. pay, cost
B. pay, paid
C. cost, pay
D. cost, cost
渗沟的形式有()。
A.填石渗沟
B.洞式渗沟
C.管式渗沟
D.填土渗沟