The lower end of each piston rod is reduced in diameter to fit a bore in the （）, this being secured to the piston rod by a nut.

[单选题]The lower section of a piston is called the （）.A . landB . skirtC . crownD . plate

[单选题]An aluminum piston has lower inertia and higher coefficient of （） compared to that of cast iron.A . viscosityB . twisting momentsC . inertiaD . thermal expansio

[单选题]The small end of the connecting rod is attached to the piston with a （）.A . crankpinB . sliding wedgeC . wrist pinD . torque bashing

[单选题]The connecting rod large end bearing shell generally has tags for location and oil grooves round the center of its axial length which correspond with grooves in the （） through which oil is transmitted up the rod to lubricate the small end.A . connect

[单选题]Each piston stuffing box is provided with two sealing rings and three（）A . packingsB . piston ringsC . distributor ringsD . scraper ring

[单选题]Compared to exchange-traded funds (ETFs), open-end mutual funds are typical

[单选题]For planning purposes, an individual wants to be able to spend €80,000 per

[单选题]An investor has just won the lottery and will receive $50,000 per year at t

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

[名词解释] 杆菌（rod）