What is head tank in the closed cooling water system used for？A.for the release of air fro

The expansion tank in a diesel engine closed freshwater cooling system is located at _____.

Many vessels are provided with flume tanks，which also have a dump tank located under the flume tanks. In the event the ship is damaged，you could dump the flume tanks into the dump tank which would （).

What is the purpose of a relief valve？A.to fill 2 tanks at the same timeB.to use pump at a

听力原文：（A) The worker is going up the stairs. （B) The gas tank in the car is full. （C) T

What is the position of the head of human－resource management in an American firm？A．He is

If fuel is burned from only the starboard tanks, the ship will _____.A.go down by the head