单项选择题
A.the border flange’s excursion and flection
B.the both end shafts line’s accordance
C.the border flange’s flection and the both end shafts line’s accordance
D.the border flange’s accordance and both end shafts flection degree
单项选择题 In the navigation（） cause the shafting over load easily.
单项选择题 When the vessel on the full speed ahead, if full astern immediately （） the main engine start astern and fuel injection.
单项选择题 According to the Robinson Graph, suddenly astern maneuvering of main engine during navigating will cause（）