单项选择题
A.indicates the engine's particulars
B.tells the engine's function
C.shows the engine's type
D.refers to the engine's information
单项选择题 Most medium and slow speed diesels are started by what medium?（）
单项选择题 Many sheath-screw davits have markings to indicate the maximum angle to which they should be cranked out. If the angle is exceeded，the davit（）.
单项选择题 Maintaining the close tolerances in diesel fuel pumps and injectors requires the use of（）.