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能荷（energy charge）
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考题
Before doing any work on a hydraulic system equipped with accumulators, you shouldA.drain the accumulators and purge with oxygenB.bleed off all stored energy from the accumulators completelyC.charge the accumulators to prevent system energy lossD.pump the hydraulic fluid into the accumulators to prevent fluid loss
考题
Recently，electric vehicles （EVs） have been claimed to provide a pathway for the transition towards sustainable transportation______EVs’ potential to solve energy and environmental problems，although new problems such as battery waste might appear.A.in behalf of
B.in honor of
C.in charge of
D.in view of
考题
单选题When the air charge contacts with the cylinders and pistons and mixes with the residual gases, it will（）A
increase in temperatureB
lose its energy partlyC
expand and do workD
begin to be compressed
考题
单选题A centrifugal pump produces flow with a resulting discharge head by energy conversionIt is typical for the energy conversion to follow the order of （）.A
mechanical energy to kinetic energy to potential energyB
mechanical energy to potential energy to kinetic energyC
potential energy to mechanical energy to kinetic energyD
kinetic energy to mechanical energy to potential energy
考题
单选题丙酮酸脱氢酶系受到哪些因素调控？（ ）A
产物抑制、能荷调控、磷酸化共价调节B
产物抑制、能荷调控、酶的诱导C
产物抑制、能荷调控、磷酸化共价调节D
能荷调控、磷酸化共价调节、酶的诱导E
能荷调控、酶的诱导
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