Transpulmonary pressure refers to

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• （） are used to limit the pressure in any particular portion and mainly control the pressure after the valve.

  A、Relief valves B、Safety valves C、Check valves D、Reducing valves

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• 英译汉：pressure

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• 静压力（static pressure）

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• The （） is a crystal which, under pressure, produces an electric current which varies with the pressure.

  A . alternator B . glass thermometer C . burdon tube D . piezoelectric pressure transducer

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• During the fuel injection period, fuel pressure must exceed cylinder gas pressure to （）.

  A . ensure penetration and distribution of the fuel in the combustion chamber B . ensure the needle valve is flushed clean during each injection C . prevent combustion gas blowback into the open needle valve D . prevent reflected pressure waves when the needle valve close

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• The device used for low-pressure control and high-pressure cutout on a compressor is called （）.

  A . cutout B . controller switch C . pressure controller D . cutout switch

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• Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?（）

  A . Pressure-reducing valve B . Unloading valve C . Counterbalance valve D . Pressure-relief valve

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• The pump discharge pressure will be considerably higher than the pressure at the （）.

  A . pump entry branch B . outlet pipe C . impeller D . None of the above is true

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• In a compression refrigeration plant the refrigerant is under low pressure in the （） and under high pressure in the （）.

  A . compressor；condenser B . condenser；evaporator C . throttle valve；evaporator D . evaporator；condenser

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• 压力抑制系统 pressure suppression system

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• The vapor pressure of a gas is the pressure necessary to keep it in a(n)（）.

  A . soluble state B . solid state C . liquefied state D . inert state

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• 水压力（hydraulic pressure）

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• 水汽压（water-vapour pressure）

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• 稳压器 pressurizer

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• When normal operating pressure is applied to the hydraulic oil used in a high-pressure system, the oil （）.

  A . viscosity will decrease B . volume will increase C . volume will decrease D . pour point will be reduced

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• Reid vapor pressure is（）.

  A . exerted by liquid cargo on the sides of a tank B . exerted by liquid cargo on a cargo hose body C . the lowest temperature and pressure that will cause a flammable liquid to give off vapors D . a measurement of the amount of flammable vapors given off by a liquid at a certain temperature

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• 中英文互译：root pressure

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• Leaky exhaust valve will result in which of the following?（） (1) high exhaust temperature; (2) low compression pressure; (3) low firing pressure.

  A . (1) and (2) B . (1) only C . (2) only D . (1),(2) and (3)

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• 流体压力（fluid pressure）

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• 207. The greater the pressure difference between a high and a low pressure center, the ______ .

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• high blood pressure 译成:

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• 输油管道流态划分的标准是：层流Re≤2000，过渡流2000<Re≤3000，紊流光滑区3000<Re≤Re1，混合摩擦区（）。

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