发生井漏时,首先根据钻井液返出情况估计()。
A、泵压
B、堵漏材料
C、漏失量
D、堵漏方法
参考答案:C
Li Qiang stared at the moving model of the waste machine, __________ by its efficiency. [ ]
A. being absorbed
B. absorbed
C. having been absorbed
D. to be absorbed
慢性萎缩性胃炎不可能出现的症状是()。
A.腹痛
B.返酸
C.腹胀
D.大便潜血弱阳性
E.消瘦