We use _____ to distill fresh water from sea water.

.Water and air are _______ to human beings. We can

Sea water is not used directly as a coolant because of _____.A.low specific heatB.high spe

The designed capacity is 25 tons a day, but the fresh water generator can only _____ 22 to

______ is used to prevent the entry of sea water to the machinery space.A.A special sealin

Lube oil in the fresh water cooling system of a diesel engine may result from a _______.A.

We can infer from the passage that______.A．when put into water, nanaoparticles are highly