单项选择题
A.are interdependent B.are not interdependent C.have nothing to do with each other D.are independent
The development of oils （） the increasing demands made ...
单项选择题The development of oils （） the increasing demands made by the steady rise in powers produced by modem diesels.
A.has kept pace with B.has kept pace to C.has made pace with D.has made pace to
（）the compression ratio, （） the proportion of the heat ...
单项选择题（）the compression ratio, （） the proportion of the heat energy of the combustion turned into useful work at the crankshaft, other things being equal.
A.The high；the large B.The higher；the larger C.The lower；the larger D.The low ；the large
（） the cylinder walls, the heat passes through them by ...
单项选择题（） the cylinder walls, the heat passes through them by conduction.
A.When receiving by B.When received by C.In order to receiving D.In order to receive
