单项选择题
Which of the following can be obtained by means of an indicator card?（）
A.the peak pressure in a cylinder B.the temperature of the cooling water C.the fuel consumption D.none of the above
单项选择题 Which of the following can be directly obtained by means of an indicator card?（）
单项选择题 Which factor of the following affects not only the fuels combustion but also the engine’s maintenance?（）
单项选择题 Which cause of the following can lead to the engine not to start on air?（）
