Which of the following accurately describes the meaning of redundant cooling？（） A: The source of cooling to a RAID system B: The cooling system in a redundant power supply C: A cooling system that can be installed in case of failure D: A second cooling system in case of a failure

__________ are<br/>manmade water bodies that offer once-through cooling<br/>pollution. () A: Artificial<br/>Lake B: Cooling towers C: Spray ponds D: Cooling ponds

In the closed cooling system， the water （）.

Diesel engines are started by supplying into the cylinders in the appropriate sequence for the required direction. A.cooling water B.compressing air C.compressed air D.cylinder oil

The main jobs of the _________ are lubricating, cooling, cleaning and sealing. A: radiator B: oil filter C: engine oil D: cooling fan

It is necessary to remove （） from the cooling spaces.

Do they have ____________ air-conditioners for cooling the rooms in summer?

Cooling the intake air supplied to a diesel engine will （）.

The cooling liquid used for the cylinder may be referred to as （）.

This improves cooling efficiency and prevents evaporation of the coolant.