单项选择题
During the deck repair,（） should be measured firstly before tail shaft is drawn out.
A.the sinking of tail shaft B.the clearance of stern bearing C.the total flexure of both end bearing D.main engine crankshaft deflection
单项选择题 To ensure the quality of dock repair, C/E should know very well （）
单项选择题 Which of the following items don’t belong to dock repair works?（）
