When William I died in Normandy in（）he

1、I broke my leg when I（）skiing in Amer

I broke my leg when I（）skiing in America.AwasBisCwould be

2、Tell me since when he ______ in your s

Tell me since when he ______ in your school.A taughtB has taughtC teachesD had taught

3、Piston compression rings used in a die

Piston compression rings used in a diesel engine function to （）Atransfer heat from the cylinder to the pistonBscrape oil from the sides of the pistonCseal the combustion space from the crankcasesDprevent any piston contact with the cylinder liner

4、Engine coolant accumulating in the die

Engine coolant accumulating in the diesel engine lubricating oil can result from a （）Alow oil pressureBhigh coolant pressureCleaking fuel injectorDcracked cylinder head or liner

5、I broke my leg when I（）skiing in Ameri

I broke my leg when I（）skiing in America.AisBwasC–（不填）Dwould be

6、In a diesel engine, when the fuel is i

In a diesel engine, when the fuel is injected into the cylinder,（）Athe piston is just coming upward from the bottom dead centerBthe piston h...