The ___________ of gases such as carbon dioxide should be stabilized at their present level.A、emissionB、emitC、radiationD、evaporation

题目
The ___________ of gases such as carbon dioxide should be stabilized at their present level.

A、emission

B、emit

C、radiation

D、evaporation

相似考题

1.If the () of carbon dioxide in the atmosphere is increased as a result of air pollution.A. rateB. proportionC. extentD. amount

2.Portable carbon dioxide fire extinguishers should be sent ashore to be rechargedA.when the remaining charge volume is less than 90 percent of the required volumeB.at each inspection for certificationC.at each annual inspectionD.when the weight loss exceeds 10% of weight of charge

3.Theoretical perfect combustion in a diesel engine yields by-products of_____.A.aldehydes and carbon dioxideB.water vapor and carbon monoxideC.nitrogen and carbon monoxideD.water vapor and carbon dioxide

4.It is pretty well understood ________ controls the flow of carbon dioxide in and out the atmosphere today.A、thatB、whatC、whenD、how

更多“The ___________ of gases such as carbon dioxide should be stabilized at their present level. A、emissionB、emitC、radiationD、evaporation”相关问题

  • 第1题：

    A liferaft which has inflated bottom-up on the water ______.

    A.should be righted by standing on the carbon dioxide cylinder，holding the righting straps and leaning backwards

    B.should be righted by standing on the life line，holding the righting straps leaning backwards

    C.will right itself when the canopy tube inflates

    D.must be cleared of the buoyant equipment before it will right itself


    正确答案：A

  • 第2题：

    What could result in an incorrect oxygen concentration reading on the oxygen indicator ________．

    A.Exposure to carbon dioxide for no more than 1 minute

    B.Exposure to carbon dioxide for more than 10 minutes

    C.Exposure to a very low concentration of sulfur dioxide for no more than 2 minutes

    D.None of the above


    正确答案：B

  • 第3题：

    ______, as the chemical extinguisher agent, should be used for an electric fire.

    A.dry chemical or foam

    B.foam or soda acid

    C.carbon dioxide or foam

    D.carbon dioxide or dry chemical


    正确答案：D
    二氧化碳或干粉灭火器作为化学灭火器，用于扑灭电器火灾。

  • 第4题：

    填空题
    Glucose can be completely broken down into carbon dioxide and water when oxygen is present in the process called aerobic respiration.____

    正确答案： H
    解析：
    根据题干信息“carbon dioxide, oxygen”可以定位到H段“When oxygen is present, glucose can be completely broken down into carbon dioxide and water in a process called aerobic respiration”，故匹配段落为H段。

  • 第5题：

    单选题
    Which of the following statements is true concerning carbon dioxide when used as a fire extinguishing agent?（）
    A

    Carbon dioxide is corrosive when exposed to fire

    B

    Carbon dioxide should be applied slowly to a large engine room fire

    C

    Its total cooling effect is far greater than water

    D

    Its smothering effect is excellent for class B fires


    正确答案： B
    解析： 暂无解析

  • 第6题：

    单选题
    Why greenhouse gases are one of the best indicators of ecological overdraft?
    A

    The cost of carbon emission permits is driven down.

    B

    Trade for carbon market failed.

    C

    Greenhouse gases are the most important guideline of ecology.

    D

    The global economy is overwhelmingly fossil-fuel dependent.


    正确答案： B
    解析：
    题目问的是：为什么温室气体是生态透支的最好指示器之一？根据文章第8段“Because the global economy is still overwhelmingly fossil-fuel dependent, the accumulation of greenhouse gases.., remain our best indicators of ‘overshoot’”可知全球经济太过依赖化石燃料，所以累积起来的温室气体指示了生态环境的透支程度。故选D。

  • 第7题：

    单选题
    Fins are installed on the fireside of water-tubes used in waste boiler to（）
    A

    decrease the velocity of gases flowing past the tubes

    B

    increase the rate of heat transfer

    C

    reduce accumulations carbon deposits

    D

    direct the flow of gases


    正确答案： D
    解析： 暂无解析

  • 第8题：

    单选题
    A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be（）.
    A

    labeled empty and recharged as soon as possible

    B

    replaced in its proper location if weight loss is no more than 25%

    C

    replaced in its proper location regardless of weight

    D

    replaced in its proper location if weight loss is no more than 15%


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    When required to work where there may be explosive gases, you should use tools which are （）
    A

    approved by the Coast Guard

    B

    high carbon steel

    C

    fixed with a ferrous cover

    D

    nonsparking


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    The danger associated with using carbon dioxide in an enclosed space is（）.
    A

    frostbite

    B

    skin burns

    C

    asphyxiation

    D

    an explosive reaction


    正确答案： B
    解析： 暂无解析

  • 第11题：

    判断题
    Natural systems can reduce the amount of carbon dioxide in the atmosphere caused by carbon emissions.
    A

    对

    B

    错


    正确答案： 对
    解析：
    录音中指出随着碳排放量的增加，空气中二氧化碳的含量从1750年以来已经增加了31%，自然通常可以把大部分碳排放吸收到海洋和森林中去，从而减少空气中碳的积累，因此题干正确。
    【录音原文】
    As a result of the steady rise in carbon emissions, the amount of carbon dioxide in the atmosphere has increased by 31% since l750—a rate unprecedented in the past 20, 000 years. Nature usually absorbs a large portion of these emissions in oceans and forests, known as “carbon sinks”, thereby slowing the rate of accumulation in the atmosphere. However, recent trends suggest that carbon emissions are outpacing absorption.

  • 第12题：

    单选题
    A fuel line breaks，sprays fuel on the hot exhaust manifold，and catches fire. Your FIRST action should be to（）.
    A

    batten down the engine room

    B

    start the fire pump

    C

    apply carbon dioxide to the fire

    D

    shut off the fuel supply


    正确答案： C
    解析： 暂无解析

  • 第13题：

    In the event of fire in a machinery space，______.

    A.the fixed carbon dioxide system should be used only when all other means of extinguishment have failed

    B.the fixed carbon dioxide system should be used immediately，as it is the most efficient means of extinguishment

    C.water in any form should not be used as it will spread the fire

    D.the space should be opened 5 minutes after flooding CO2 to prevent injury to personnel


    正确答案：A

  • 第14题：

    The most effective way of applying carbon dioxide from a portable extinguisher to a fire is by ______．

    A.Forming a cloud cover over the flames

    B.Directing the gas at the base of the flames in a slow sweeping motion

    C.Discharging the carbon dioxide into the heart of the flames

    D.Bouncing the discharge off an adjacent bulkhead just above the burning surface


    正确答案：B

  • 第15题：

    A carbon dioxide fire extinguisher should be recharged ______.

    A.at least annually

    B.whenever it is below its required weight

    C.only if the extinguisher has been used

    D.before every safety inspection


    正确答案：B
    二氧化碳灭火器一般重量减少百分之十必须从新填装。

  • 第16题：

    单选题
    The discharge from a carbon dioxide fire extinguisher should be directed（）.
    A

    at the base of the flames

    B

    at the center of the flames

    C

    to the lee side of the flames

    D

    over the tops of the flames


    正确答案： A
    解析： 暂无解析

  • 第17题：

    单选题
    Theoretical perfect combustion in a diesel engine yields by-products of （）.
    A

    aldehydes and carbon dioxide

    B

    water vapor and carbon monoxide

    C

    nitrogen and carbon monoxide

    D

    water vapor and carbon dioxide


    正确答案： D
    解析： 暂无解析

  • 第18题：

    单选题
    A carbon dioxide fire extinguisher should be recharged（）.
    A

    at least annually

    B

    whenever it is below its required weight

    C

    only if the extinguisher has been used

    D

    before every safety inspection


    正确答案： B
    解析： 暂无解析

  • 第19题：

    单选题
    An advantage of a dry chemical over a carbon dioxide fire extinguish is its（）.
    A

    greater range

    B

    effective on all types of fires

    C

    cleanliness

    D

    All of the above


    正确答案： D
    解析： 暂无解析

  • 第20题：

    单选题
    As compared to carbon dioxide，dry chemical has which advantage?（）.
    A

    Cleaner

    B

    Effective on metal fires

    C

    Greater range

    D

    More cooling effect


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    Portable carbon dioxide fire extinguishers should be sent ashore to be recharged （）.
    A

    when the remaining charge volume is less than 90 percent of the required VOLUME

    B

    at each inspection for certification

    C

    at each annual inspection

    D

    when the weight loss exceeds 10% of weight of charge


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    Why should you wear a self-contained breathing apparatus before entering the engine room after the fixed CO2 system has been discharged to combat a major fire?（）
    A

    Because carbon dioxide dilutes the oxygen concentration in the atmosphere and may cause asphyxiation

    B

    Because carbon dioxide breaks down in a fire into carbon monoxide which may cause blood poisoning in the person breathing this gas

    C

    Because carbon dioxide is a colorless and odorless gas that becomes highly toxic in the presence of high temperatures and will quickly incapacitate a person exposed to this gas

    D

    This action is unnecessary as carbon dioxide is not poisonous nor toxic but is a relatively harmless gas


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    According to the T-Boat regulations the reason for providing adequate ventilation for a battery storage area is to prevent（）.
    A

    accumulation of carbon dioxide gas that chokes the battery

    B

    accumulation of explosive and toxic gases the battery can generate

    C

    mildew or dry rot in the battery box

    D

    battery failure including battery case meltdown caused by excessive heat


    正确答案： D
    解析： 暂无解析

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