单项选择题
Immediately after any diesel engine is started, the engineer should check the （）
A.crankcase pressure B.lube oil pressure C.saltwater pressure D.exhaust temperature
单项选择题 The rate of heat transfer in a water-tube auxiliary boiler can be increased by （）.
单项选择题 The term “proper metering”, as applied to a diesel fuel injection system, can be best defined as （）.
单项选择题 Connecting rods in a diesel engine are used to connect the （）.
