Due to （） action of pistons some relative motion between parts in contact in the coolant supply and return system must occur.

[单选题]D．ue to action of pistons some relative motion between parts in contact in the coolant supply and return system must occur.A．reciprocatingB．rotatingC．runningD．removing

[单选题]Due to the __________influence, some Chinese learners of English wrongly pa

[单选题]Although some countries have taken action to solve the shortage of water, i

[单选题]（） provide the water to the pistons.A . Pneumatic pipesB . Hydraulic pipesC . Telescopic pipesD . Operating gas pipe

[单选题]Aluminum pistons have （） coefficient of thermal expansion compared with those of cast iron.A . higherB . lowerC . the sameD . none of the above

[单选题]Pistons may be made in （） in order to keep the weight down for balancing purposes at high speed.A . cast ironB . forged steelC . stainless steelD . aluminum alloy

[单选题]The pistons are cooled by oil supplied from the forced （） system.A . fresh waterB . sea waterC . lubricationD . fuel oil

[单选题]An advantage of aluminum pistons, when compared to cast iron pistons is （）.A . greater high temperature strengthB . better heat conductivityC . greater weight per cubic inchD . increased resistance to wear

[试题]D．ue to a constantly __(66)__ environment, a poor understanding of the user’s needs and preferences, as well as a __(67)__ of willingness to modify __(68)__ organizational structures and decision models, the full economic potential of Web Information

[名词解释] ACTION开拍