水泥固住部分管柱不能正常提出管柱的事故称为()。
A、落物卡
B、砂卡
C、水泥卡
D、套管变形卡
参考答案:C
— You never feel worried before an exam, how can you?
— Well, I've been working hard all the time. Surely I am _____ any exam. [ ]
A. busy with
B. afraid of
C. ready for
D. interested in
有卒中病史的急性冠状动脉综合征患者禁用()
A.替格瑞洛
B.普拉格雷
C.阿司匹林
D.替罗非班
E.依替巴肽