The pressure ________ causes Americans选择The pressure ________ causes Americans to be energetic, but it also puts them under a constant emotional strain.A) to compete B) competing C) to be competed D) having competed

题目
The pressure ________ causes Americans选择

The pressure ________ causes Americans to be energetic, but it also puts them under a constant emotional strain.

A) to compete        B) competing         C) to be competed     D) having competed

 

 

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更多“The pressure ________ causes Americans选择 Thepressure________causesAmericanstobeenergetic,butitalsoputsthemunderaconstantemotionalstrain.A)tocompeteB)competingC)tobecompetedD)havingcompeted”相关问题

  • 第1题：

    John is collaborating with mary in writing an article.

    A．cooperating

    B．competing

    C．combining

    D．arguing


    正确答案：A
    解析：本题考查的是对动词的辨析。这句话的意思是：约翰与玛丽合作写一篇文章。本题考察对动词的掌握。A．cooperating合作；B．competing竞争；C．combining合并；D．arguing争论。句中collaborate是合作、勾结的意思。本句时态是现在进行时，动词应用其现在分词形式，因此选A．cooperating。例如：She has agreed to cooperate with the police in the investigation．她同意在调查中跟警察合作。

  • 第2题：

    According to the anti -railway group, all the followings are true but ______.

    A) tunnels are dangerous to public health

    B) the noise and the glare of the engine fire may affect people' s nerves

    C) the rapid speed through the air does damage to people's lungs

    D) to those with high blood - pressure, the rapid speed of the train causes them to die


    正确答案：D
    答案：D
    [试题分析]细节题。
    [详细解答]从第二段的内容我们可以找到选项A，B，C对应的内容，而D不对，因为，文中只是提到“In those with high blood-pressure，the movement of the train might produce apoplexy，”，而不是让血压高的人死去。因此，答案为D。

  • 第3题：

    What causes the lube oil pressure of the engine to drop ?


    正确答案：Lube oil temperature is too high , the level in the oil sump is too low ,the oil pipe leakage or the lube oil pump is abnormal .

  • 第4题：

    Why do American restaurants serve large portions?

    A Because Americans associate quantity with value.
    B Because Americans have big bellies.
    C Because Americans are good eaters.
    D Because Americans are greedy.

    答案：A
    解析：

  • 第5题：

    When I try to understand（ ）that prevents so many Americans from being as happy as one might expect,it seems to me that there are two causes.

    A.why it does
    B.what it does
    C.what it is
    D.why it is

    答案：C
    解析：
    该题考查句子结构。根据题干，“that...might expect”在句中做understand的宾语。宾语从句可由连接词that引导，that仅起连接作用，常可省略。若连接词在句中兼起一个句子成分的作用，则应使用what,how,when,why,who,which,where等连词，但要用陈述语气，根据句意答案为C，连接词在句中做表语。

  • 第6题：

    单选题
    A

    The causes are obvious.

    B

    The causes are very complicated.

    C

    The causes are familiar.

    D

    The causes are not well understood.


    正确答案： B
    解析：
    推断题。从录音开头部分“their cause and control remain a serious problem that is difficult to solve”可推断，由于原因复杂，所以难以解决。故选B。

  • 第7题：

    单选题
    Refrigerant enters the condenser as a （）.
    A

    high pressure liquid

    B

    low pressure vapor

    C

    high pressure vapor

    D

    low pressure liquid


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    In terms of pressure and temperature in the refrigerant in the compressor, what happens to the primary?（）
    A

    its pressure and temperature are both lowered

    B

    its pressure and temperature are both raised

    C

    its pressure is lowered and its temperature is raised

    D

    its pressure is raised and its temperature is lowered


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    Which statement about diesel engine combustion is true?（）
    A

    Combustion does not begin until the piston starts down on the power stroke

    B

    Maximum combustion pressure is reached before TDC

    C

    Turbulence in the cylinder causes a delay in ignition

    D

    Maximum cylinder firing pressure is not developed until the piston passes TDC


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    Which of the following best describes the thermodynamic effect on the pressure and volume relationship with regards to saturated gases?（）
    A

    As pressure decreases, volume increases

    B

    As volume increases, pressure increases

    C

    As volume decreases, pressure decreases

    D

    As pressure increases, volume increases


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    Why will a turbocharger diesel engine produce black smoke if excessive additional load is applied too quickly?（）
    A

    Exhaust energy would draw excess air

    B

    The inertia of the turbocharger rotor causes a time lag which delays the turbocharger speed increase

    C

    Exhaust gas pumping losses are increased due to turbine windage

    D

    Exhaust gas back pressure falls slightly due to increased nozzle action


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    If a diesel engine fails to start，one of the likely causes is （）
    A

    low compression temperature

    B

    low ambient air pressure

    C

    high lube oil pump pressure

    D

    high fuel oil booster pump pressure


    正确答案： B
    解析： 暂无解析

  • 第13题：

    Pressure gradient is a measure of ______.

    A.a high-pressure area

    B.pressure difference over horizontal distance

    C.pressure difference over time

    D.vertical pressure variation


    正确答案：B
    气压梯度是水平距离上气压差别的计量。

  • 第14题：

    Text 3

    Under certain circumstances, the human body must cope with gases at greater-than-normal atmospheric pressure. For example, gas pressures increase rapidly during a dive made with scuba gear because the breathing equipment allows divers to stay underwater longer and dive deeper.

    The pressure exerted on the human body increases by 1 atmosphere for every 10 meters of depth in seawater, so that at 30 meters in seawater a diver is exposed to a pressure of about 4 atmospheres. The pressure of the gases being breathed must equal the external pressure applied to the body, otherwise breathing is very difficult. Therefore all of the gases in the air breathed by a scuba diver at 40 meters are present at five times their usual pressure. Nitrogen, which composes 80 per cent of the air we breathe, usually causes a balmy feeling of well-being at this pressure. At a depth of 5 atmospheres, nitrogen causes symptoms resembling alcohol intoxication, known as nitrogen narcosis. Nitrogen narcosis apparently results from a direct effect on the brain of the large amounts of nitrogen cause under these pressurized helium does not exert a similar narcotic effect.

    As a scuba diver descends, the pressure of nitrogen in the lungs increases. Nitrogen then diffuses from the lungs to the blood, and from the blood to body tissues. The reverse occurs when the diver surfaces; the nitrogen pressure in the lungs falls and the nitrogen diffuses from the tissues into the blood, and from the blood into the lungs. If the return to the surface is too rapid, nitrogen in the tissues and blood cannot diffuse out rapidly enough and nitrogen bubbles are formed. They can cause severe pains, particularly around the joints.

    Another complication may result if the breath is held during ascent. During ascent from a depth of 10 meters, the volume of air in the lungs will double because the air pressure at the surface is only half of what it was at 10 meters. This change in volume may cause the lungs to distend and even rupture. This condition is called air embolism. To avoid this event, a diver must ascend slowly, never at a rate exceeding the rise of the exhaled air bubbles, and must exhale during as- cent.

    31. What does the passage mainly discuss?

    A) The equipment divers use.

    B) The effects of pressure on gases in the human body.

    C) How to prepare for a deep dive.

    D) The symptoms of nitrogen bubbles in the bloodstream.


    正确答案：B
    答案：B
    [试题分析] 文章主旨题。
    [详细解答] 文章第一段提出话题，接下来通过原理结合实际来讲述压力的改变对身体的影响。还详细介绍了潜水过程中，下潜和上升过程中会出现的情况，因此，答案为 B较为合理。

  • 第15题：

    ________ causes strong winds and rough sea at northwest Bay of Biscay．

    A.Strong low pressure

    B.Strong high pressure

    C.Steep pressure gradient

    D.Steep gradient pressure


    正确答案：C

  • 第16题：

    What does the survey indicate?

    A Many poor Americans want large portions.
    B Twenty percent Americans want smaller portions.
    C Fifty seven percent Americans earn $150 ，000 per year.
    D Twenty three percent Americans earn less than $25，000 per year.

    答案：A
    解析：

  • 第17题：

    单选题
    Supposing there is a water container. The taller the container, ______ at the bottom.
    A

    greater will the water pressure be

    B

    the water pressure will be greater

    C

    the greater the water pressure will be

    D

    greater the water pressure will be


    正确答案： C
    解析：
    假设这里有一个装水的容器，容器越高，容器底部所受的压强就越大。这里考查越…越…的英文表达方式，C项正确，即the more...the more....的形式。

  • 第18题：

    单选题
    The sudden reduction of pressure occurring within the crankcase of a refrigeration compressor during starting causes the （）.
    A

    sudden evaporation of wax crystals in the lubricant

    B

    sudden evaporation of entrapped air in the lubricant

    C

    release of refrigerant from the oil/refrigerant mixture

    D

    release of dissolved lubricant from the refrigerant


    正确答案： B
    解析： 暂无解析

  • 第19题：

    单选题
    The most important factor that causes the wear of the engine parts is （）.
    A

    excessive heat

    B

    friction

    C

    oxidation

    D

    high pressure


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    When using a high-velocity fog stream in a passageway，the possibility of a blow back must be guarded against. Blow back is most likely to occur when（）.
    A

    pressure builds up in the nozzle which causes a surge of water

    B

    the only opening in a passageway is the one from which the nozzle is being advanced

    C

    pressure in the fire hose drops below 100 psi

    D

    a bulkhead collapses due to heat and pressure


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    An auxiliary reservoir for starting auxiliary engines should be kept at （）.
    A

    low pressure at all times

    B

    full pressure at all times

    C

    low pressure at intermittence

    D

    full pressure at intermittence


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    The single acting cylinder is the simplest form where pressure is applied to the full area of the piston head to move the load through piston rod extensionThe load causes rod （） when the drive pressure is released.
    A

    contraction

    B

    retraction

    C

    expansion

    D

    shrinkage


    正确答案： A
    解析： 暂无解析

  • 第23题：

    单选题
    The direction of the surface wind is（）.
    A

    directly from high pressure toward low pressure

    B

    directly from low pressure toward high pressure

    C

    from high pressure toward low pressure deflected by the earth's rotation

    D

    from low pressure toward high pressure deflected by the earth's rotation


    正确答案： C
    解析： 暂无解析

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