什么是循环法封窜?
参考答案:
循环法封窜是指将封堵用的水泥浆以循环的方式,在不憋压力的情况下替入窜槽井段的窜槽孔缝内,使水泥浆在窜槽孔缝内凝固,封堵窜槽井段。
中枢性性早熟的首选治疗药物是()。
A.酮康唑
B.GnRH类似物
C.环丙孕酮
D.达那唑
E.安体舒通
—I hope that you'll have a good holiday in Hainan Island during the Spring Festival.
— _____[ ]
A. Yes, I have, but only once.
B. Don't worry. You'll be OK.
C. Thanks a lot. Goodbye!
D. That's all right.