Lubeoilpumpstakingsuctionfromthesumpofmostsmallmarineenginesareusually().
A. ofthediaphragmtype
B. ofthecentrifugaltype
C. ofthepositivedisplacementtype
D. independentlydrivenbyelectricmotors
Ononehand,youhavetocontinueloading,on()hand,I’llcontacttheDespatchOfficerightnow.
A. another
B. other
C. theother
D. theothers
一期焦炉上部横拉条直径为()mm。
A. 39
B. 42
C. 52
Permissioniskindlyrequestedto()incelebrationofourNationalDay.
A. dressmyshipoverall
B. raisemyshipoverall
C. hoistmyshipoverall
D. displaymyshipfromstemtostern