The burning of the fuel adds more heat to the air charge, causing it to expand and force the engine piston to do work on the crankshaftWhat does “it” mean in this sentence?（）

[单选题]The heat that is produced by burning garbage can be used to______.A． make electricityB． make energy sourceC． boil waterD． save coal

[单选题]When the fuel oil is burning in the combustion chamber, it _____.A．gives up large amount of heatB．gives off large amount of heatC．gives up large amount of steamD．gives off large amount of steam

[单选题]When the fuel oil is burning in the combustion chamber, it （）.A . gives up large amount of heatB . gives off large amount of heatC . gives up large amount of steamD . gives off large amount of steam

[单选题]（） the cylinder walls, the heat passes through them by conduction.A . When receiving byB . When received byC . In order to receivingD . In order to receive

[单选题]Impurities in the fuel oil will affect the operation of the engine, which has （） the use of separator and some other devices.A . brought aboutB . caused forC . resulted fromD . led

[单选题]Fuel oil is pumped by means of （） from the bunker tanks.A . a transfer pumpB . a bilge pumpC . a service pumpD . a vacuum pum

[单选题]A．ccording to statistics, a man is more than twice as likely to die of skin cancer _________ a woman.A． thanB． suchC． soD． as

[试题](49) He adds humbly that perhaps he was "superior to the common run of men in noticing things which easily escape attention, and in observing them carefully."此处译文为：

[试题]H．e adds humbly that perhaps he was “superior to the common run of men in noticing things which easily escape attention, and in observing them carefully.”

[单选题]In the experiment, the burning inside the bottle can___.A． equalize the air pressure inside and outsideB． make a seal in the neck of the bottleC． finish up the oxygen inside the bottleD． produce more oxygen inside the bottle