An aluminum piston has lower inertia and higher coefficient of （） compared to that of cast iron.

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

[单选题]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.A . piston gudgeon pinB . piston skirtC . cross-headD . cross-head pi

[单选题]Piston No2 of main engine has been removed, and it will be （） by noon tomorrow.A . liftedB . reassembledC . dismountedD . disassembled

[单选题]If Investor A has a lower risk aversion coefficient than Investor B, on the

[单选题]Assume the U.S. Federal Reserve system (the Fed) has decided to lower inter

[单选题]If Investor A has a lower risk aversion coefficient than Investor B, will I

[单选题]Aluminum lifeboats are subject to damage by electrolytic corrosion (the aluminum being eaten away). In working around boats of aluminum you must be very careful（）.A . to keep the boats covered at all timesB . not to leave steel or iron tools lying in

[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 have low inertia and high coefficient of thermal expansion.A . Cast ironB . Cast steelC . Forged steelD . Aluminum

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