单项选择题

Which of the following can be directly obtained by means of an indicator card?（）

A.power
B.maximum pressure in a cylinder
C.mean pressure in a cylinder
D.all of the above

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单项选择题

A.cetane number
B.flash point
C.viscosity
D.setting point

单项选择题

A.starting air pressure too high
B.correct timing of starting air valves
C.three of the starting valves stuck
D.the turning gear disengaged

单项选择题

A.attached to the indicators
B.opened
C.closed
D.broken