Aristotle, the Greek philosopher, had a theory that the heart was a blood-cooling mechanism.

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

The main function of calcitonin is A: increase blood calcium and blood phosphorus B: decrease blood calcium and blood phosphorus C: decrease blood calcium and increase blood phosphorus D: increase blood calcium and decrease blood phosphorus E: involve in the normal calcium regulation

In the closed cooling system， the water （）.

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

Directions: Please read the following sentences and choose the correct answers.A test to check your blood is called a ________.? blood type;|blood test ;|blood;trial;|;blood vessel

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

Skin and mucous membrane paleness is mainly seen in A: Decrease of bilirubin in blood B: Reduced hemoglobin in blood C: Increase of bilirubin in blood D: Increase of reduced hemoglobin in blood E: Decrease of hemoglobin in blood

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