The cylinder contains a great weight of air and is capable of burning a great quantity of fuel at（）.

[单选题]（） the cylinder will contain a great weight of air and will be capable of burning a great quantity of fuel.A . At the beginning of the compression strokeB . At the beginning of the suction strokeC . At the end of the working strokeD . At the end of t

[单选题]The cylinder head, cylinder liner and （） form the combustion chamber.A . frameB . pistonC . crankcaseD . explosion plate

[单选题]（） is used for cylinder and cylinder head, the salt water is used for cooling the lubricating oil, the fresh water in the coolers and the charging air in the air cooler.A . The fuel oilB . The lube oilC . The sea waterD . The fresh water

[单选题]Cracks in cylinder and cylinder covers may （） from unequal heating.A . makeB . causeC . resultD . produce

[单选题], the brains of a computer, it contains the ALU, the clock, many registers, the bus interface, and circuitry that makes these pans work together.A．I/O deviceB．CPUC．MemoryD．Operating system

[单选题]The cylinder cover is not provided with ( )A．fuel valveB．the starting valveC．lubricator

[单选题]The cylinder liners are made of _____ and the cylinder surfaces are sometimes chromium-plated.A．steelB．copperC．cast ironD．stainless steel

[单选题]The withdrawing of the cylinder liners, in general, depends on their （）.This may amount to approximately 1/120 of the diameter in some engines.A . correct maneuveringB . wearC . working efficiencyD . maintenance

[单选题]The cylinder cover is not provided with （）.A . fuel valveB . lubricatorC . indicator valveD . the starting valve

[单选题]The lubricating system for the cylinder walls is different from the bearings in that the oil for former one is supplied in （） while that for latter one is （）.A . sufficient quantity； measuredB . measured quantity；sufficientC . excessive quantity；suff