张拉千斤顶应每月校准一次,当千斤顶发生故障修理后以及钢铰线发生连续断丝时也应进行校准。
参考答案:对
-- When will you have your MP4 repaired?
--Pardon?
--I asked you ___________.
A.when will you have your MP4 repaired
B.whether you would have your MP4 repaired
C.when you would have your MP4 repaired
D.that you would have your MP4 repaired
胎盘剥离后正确处理是
A.按压子宫底部,轻拉脐带助胎盘娩出B.牵拉脐带助其娩出C.手取胎盘D.加强宫缩可用缩宫素,麦角新碱E.刮宫术