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. Bicycle inner tube for the pump to boost the morale of the process, the pump's cylinder wall tempe

guard your home2010-03-15 04:11:13 +0000 #1
. Bicycle inner tube for the pump to boost the morale of the process, the pump's cylinder wall temperature is the direct cause ()

A. Piston pump wall to overcome the friction do work with compressed gases do work

B. Piston compressed gases do work

C. Pistons do work to overcome the friction and gas pump wall heat transfer

D. Doing work to overcome the friction piston pump wall
date yet shun2010-03-15 04:18:31 +0000 #2
A

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