Air cocks, usually positioned at the_______in a circulating system, is used to get rid of the air in the system.A.bending jointB.expansion tankC.weldD.the highest point
Air cocks, usually positioned at the_______in a circulating system, is used to get rid of the air in the system.
A.bending joint
B.expansion tank
C.weld
D.the highest point
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The ovaries are also part of ( ) system when they produce eatrogen and progesterone. () A、endocrineB、reproductiveC、sexualD、circulating
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