During the 4th stroke, ______ and piston moves up, pushing the burned gases out of the cylinder chamber.

[单选题]The energy for pushing this piston up can be supplied from （）, so that the piston can keep moving up and down.A . the same pistonB . the piston nearbyC . the other pistonsD . the generators on board

[单选题]During the suction stroke, the piston is moving （）.A . inwardsB . outwardsC . downwardsD . upward

[单选题]The piston moves up and down, thus causing the rotational movement of the（）A . crankshaftB . connecting rodC . cross-headD . main beating

Fuel injection begins during the compression stroke, before the piston reaches _

A piston in a four-stroke/cycle diesel engine makes four strokes during each( )

[单选题]A．ccording to the 4th paragraph, a great many poor people in American cities.A． are faced with housing problemsB． are forced to move to the suburbsC． want to sell their buildingsD． need more money for daily expenses

[单选题](piston area)×(piston stroke)×(numbers of the cylinders)=engine( ).A．brake horsepowerB．displacementC．cylinder volumeD．cylinder clearance

[单选题]The 4th paragraph suggests thatA． questions are often put to the more intelligent students.B． alphabetically disadvantaged students often escape form. class.C． teachers should pay attention to all of their students.D． students should be seated accord

[单选题]is the 4th layer of the OSI reference model responsible for reliable network communication between end nodes.A．Data link layerB．Session layerC．Transport layerD．Application layer

14.(单选题)When the piston moves up with both intake and exhaust valves closed, we