问答题Practice 1　　Heat loss by sweating depends on the fact that when a liquid evaporates, it absorbs an enormous quantity of heat from its surroundings. Therefore, when I am of sweat evaporate, a great deal of heat is absorbed from the surface of the body i

题目
问答题
Practice 1　　Heat loss by sweating depends on the fact that when a liquid evaporates, it absorbs an enormous quantity of heat from its surroundings. Therefore, when I am of sweat evaporate, a great deal of heat is absorbed from the surface of the body in contact with it. 1______　　2______ The first is the amount of movement of air surrounding the body. The second is the amount of water vapor in the air that surrounds the body.　　3______ For this reason, sweat evaporates very rapidly on windy days, and the rate of heat loss by sweating is much more than on a still day. This accounts for the fact that hot still days are much less comfortable than hot windy days. In contrast, the sweat evaporates very rapidly on hot windy days, and cools the body quickly and effectively.　　4______ When air is carrying the maximum amount of water vapor that it can hold, it is said to be 100% saturated with water vapor. The relative humidity of the air is said to be 100%. Under these conditions the air cannot carry any water, so no water can evaporate. When the relative humidity is high, therefore, sweat cannot evaporate. Instead, it forms large drops and runs off your skin without cooling you.　　5______ It is obvious that under these conditions, evaporation will be much more rapid. Therefore, sweating will be much more effective as a method of losing heat from the body. On a hot dry day, sweat evaporates as soon as it is formed, and you feel reasonably cool even though the temperature of your environment is very high.[A] When the air is very dry and carries no water at all, the relative humidity is said to be 0%.[B] The second factor is the amount of water vapor in the air－the humidity.[C] Hot windy days are much more comfortable than hot still days.[D] This heat transfer occurs even if the environment is hotter than the body.[E] When air moves over the surface of water, the amount of evaporation is greatly increased.[F] You might expect the highest incidence of a heat stroke when the maximum temperature is 100 and humidity is 50%.[G] Two factors affect the rate of evaporation of sweat, and therefore the effectiveness of sweating as a method of cooling the body.
相似考题

1.CSometimes, the simplest ideas are the best. For example, to absorb heat from the sun to heat water, you need large, flat, black surfaces. One way to do that is to build those surfaces specially, on the roofs of buildings. But why go to all that trouble when cities are full of black surfaces already, in the form. of asphalt (柏油) roads?Ten years ago, this thought came into the mind of Arian de Bondt, a Dutch engineer. He finally persuaded his boss to follow it up. The result is that their building is now heated in winter and cooled in summer by a system that relies on the surface of the road outside.The heat-collector is a system of connected water pipes. Most of them run from one side of the street to the other, just under the asphalt road. Some, however, dive deep into the ground.When the street surface gets hot in summer, water pumped through the pipes picks up this heat and takes it underground through one of the diving pipes. At a depth of 100 metres lies a natural aquifer (蓄水层) into which several heat exchangers (交换器) have been built. The hot water from the street runs through these exchangers, warming the ground-water, before returning to the surface through another pipe. The aquifer is thus used as a heat store.In winter, the working system is changed slightly. Water is pumped through the heat exchangers to pick up the heat stored during summer. This water goes into the building and is used to warm the place up. After performing that task, it is pumped under the asphalt and its remaining heat keeps the road free of snow and ice.64. Which of the following is true according to the first two paragraphs?A. Arian de Bondt got his idea from his boss.B. Large, flat, black surfaces need to be built in cities.C. The Dutch engineer's system has been widely used.D. Heat can also be collected from asphalt roads.

2.Which of the following statements about the warm-blooded mammals is true according to the text?A. They can change their environments.B. They can adjust body heat to keep their ideal temperature.C. They can make food from chemicals.D. They get most of their heat from the environment.

3.Heat exhaustion is caused by excessive ______.A.loss of body temperatureB.loss of water and salt from the bodyC.gain in body temperatureD.intake of water when working or exercising

4.For what purpose are the diving pipes used?A. To absorb heat from the sun.B. To store heat for future use.C. To turn solar energy into heat energy.D. To carry heat down below the surface.

参考答案和解析
正确答案： 1.D 空前说“出汗能散热是因为液体蒸发的时候可以带走周围大量的热量。所以当我出汗时,大量的热量被从身体表面吸走了”。D项说“即使周围温度笔体温高时,热量传递也是可以进行的”。符合逻辑关系。故选D。
2.G 根据关键词“the first,the second”可知,本段讲的是两大因素。G项说“影响汗水蒸发的因素有两个”。符合逻辑关系。故选G。
3.E 本段讲的是空气流动情况下汗水的蒸发状况。E项说“当空气在水的表面流动时,蒸发量大为增加”。符合文意。故选E。
4.B 本段讲的是湿度对蒸发的影响。故选B。
5.A 倒数第二段说“当湿度是100%时,蒸发就不能进行了”。最后一段说“在这种情况下,蒸发速度很快”。说明空处讲的是湿度很低的情况。故选A。
解析： 暂无解析
更多“问答题Practice 1　　Heat loss by sweating depends on the fact that when a liquid evaporates, it absorbs an enormous quantity of heat from its surroundings. Therefore, when I am of sweat evaporate, a great deal of heat is absorbed from the surface of the body i”相关问题

  • 第1题：

    共用题干
    How the Body Keeps the Same Temperature

    The temperature of your body should always be the same if you are fine,no matter whether the weather
    is hot or cold.That is why the doctor tests your temperature with a thermometer when you are sick.Normally,
    your body teniperature is ninety-eight point six degrees Fahrenheit.If it is_______(51)than that,it is a
    stire sign that something is wrong with your body.
    Your body keeps the same temperature all the time,because it balances the heat it produces and the
    heat it_______(52)off. It is always burning up food and producing heat.It can produce heat faster
    when the body needs or give off heat faster when the body becomes too warm.Let's see_______(53)
    this works.
    The heat of your body is given off chiefly through the skin.When you feel_______(54),your skin
    is tight and shows"goose flesh".When you feel chilly,you must_______(55)around to keep warm.
    _______(56)your muscles begin to work,bum up fuel and produce more heat.It is not_______(57)to
    shiver,so you usually prefer warming up by taking exercise,or put_______(58)more clothes to keep
    warm。
    When you get warm,the skin is loose and soft. It is so supplied_______(59)blood that heat is giv-
    en off rapidly. If you get too warm,you begin to sweat and_______(60)body heat is used in evaporating
    the, moisture in your body.In warm_______(61)or warm rooms,you wear less clothing,
    _______ (62)heat can be given off freely. You prefer less exercise because your body is warm_______(63),and
    the extra heat produced by taking too much exercise makes you uncomfortable.
    Now you see why you_______(64)differently in different kinds of weather. In summer,when it is
    hot,you feel tired and lazy.You do not care to work or play,but enjoy lying down and doing nothing. When
    you get out of door in winter,the cold air makes you feel_______(65).You want to run and play.

    _________(61)
    A:weather
    B:climate
    C:circumstance
    D:environment

    答案：A
    解析：
    前面的内容讲的是，体温要保持一定的稳定性，人的身体才会健康。由此可推断，体温过高或过低都说明人的身体出现了问题。结合选项可知选D。
    give off意为“发出，放出（气味、热等）";put off意为“推迟”;show off意为“炫耀”;keep off意为“使……远离”。结合句意应选A。
    前面简单提到我们的身体需要热量的时候就能产生热量，我们的身体变得太暖和的时 候就会很快地释放热量。根据上下文可知，这里是一个过渡的句子，意为“让我们看看这是怎 么工作的”。故选A。
    结合常识可知，当你感到冷的时候，会起鸡皮疙瘩。因此选D。
    make做；eat吃；work工作；jump跳。这里说的是如果你感到很冷，你必须要跳来跳去 来取暖。故选D。
    前面提到跳来跳去来取暖，那么接着肌肉就开始工作了。then表示“接着”，符合句意。
    结合常识可知，颤抖是不令人愉快的，且后面的句子中有prefer，因此应选B。
    put on意为“穿上”，符合句意。
    supply with意为“提供……”，为固定搭配，符合句意。
    more更多的；enough足够的；many很多little很少。此句意为：更多的身体热量用来蒸 发身体里的水分。因此选A。
    weather天气；climate气候；circumstance条件，状况；environment环境。结合句意应 选A。
    or否则；so that以便；but但是；and和。结合句意应选B。
    本句的意思是：你喜欢少运动是因为你的身体足够的暖和。因此选C。
    根据后面讲的夏天和冬天的感受可知，这里应选feel,
    结合上下文的意思可知，夏天人们喜欢躺在床上什么也不做，而在冬天人们通过运动 来取暖。由此可知，在冬天人们显得生机勃勃。

  • 第2题：

    共用题干
    How the Body Keeps the Same Temperature

    The temperature of your body should always be the same if you are fine,no matter whether the weather
    is hot or cold.That is why the doctor tests your temperature with a thermometer when you are sick.Normally,
    your body teniperature is ninety-eight point six degrees Fahrenheit.If it is_______(51)than that,it is a
    stire sign that something is wrong with your body.
    Your body keeps the same temperature all the time,because it balances the heat it produces and the
    heat it_______(52)off. It is always burning up food and producing heat.It can produce heat faster
    when the body needs or give off heat faster when the body becomes too warm.Let's see_______(53)
    this works.
    The heat of your body is given off chiefly through the skin.When you feel_______(54),your skin
    is tight and shows"goose flesh".When you feel chilly,you must_______(55)around to keep warm.
    _______(56)your muscles begin to work,bum up fuel and produce more heat.It is not_______(57)to
    shiver,so you usually prefer warming up by taking exercise,or put_______(58)more clothes to keep
    warm。
    When you get warm,the skin is loose and soft. It is so supplied_______(59)blood that heat is giv-
    en off rapidly. If you get too warm,you begin to sweat and_______(60)body heat is used in evaporating
    the, moisture in your body.In warm_______(61)or warm rooms,you wear less clothing,
    _______ (62)heat can be given off freely. You prefer less exercise because your body is warm_______(63),and
    the extra heat produced by taking too much exercise makes you uncomfortable.
    Now you see why you_______(64)differently in different kinds of weather. In summer,when it is
    hot,you feel tired and lazy.You do not care to work or play,but enjoy lying down and doing nothing. When
    you get out of door in winter,the cold air makes you feel_______(65).You want to run and play.

    _________(64)
    A:wear
    B:feel
    C:dress
    D:sweat

    答案：B
    解析：
    前面的内容讲的是，体温要保持一定的稳定性，人的身体才会健康。由此可推断，体温过高或过低都说明人的身体出现了问题。结合选项可知选D。
    give off意为“发出，放出（气味、热等）";put off意为“推迟”;show off意为“炫耀”;keep off意为“使……远离”。结合句意应选A。
    前面简单提到我们的身体需要热量的时候就能产生热量，我们的身体变得太暖和的时 候就会很快地释放热量。根据上下文可知，这里是一个过渡的句子，意为“让我们看看这是怎 么工作的”。故选A。
    结合常识可知，当你感到冷的时候，会起鸡皮疙瘩。因此选D。
    make做；eat吃；work工作；jump跳。这里说的是如果你感到很冷，你必须要跳来跳去 来取暖。故选D。
    前面提到跳来跳去来取暖，那么接着肌肉就开始工作了。then表示“接着”，符合句意。
    结合常识可知，颤抖是不令人愉快的，且后面的句子中有prefer，因此应选B。
    put on意为“穿上”，符合句意。
    supply with意为“提供……”，为固定搭配，符合句意。
    more更多的；enough足够的；many很多little很少。此句意为：更多的身体热量用来蒸 发身体里的水分。因此选A。
    weather天气；climate气候；circumstance条件，状况；environment环境。结合句意应 选A。
    or否则；so that以便；but但是；and和。结合句意应选B。
    本句的意思是：你喜欢少运动是因为你的身体足够的暖和。因此选C。
    根据后面讲的夏天和冬天的感受可知，这里应选feel,
    结合上下文的意思可知，夏天人们喜欢躺在床上什么也不做，而在冬天人们通过运动 来取暖。由此可知，在冬天人们显得生机勃勃。

  • 第3题：

    单选题
    The function of a lubricating oil is （） to lubricate the running surface （） to carry away a great deal of heat.
    A

    not；but

    B

    neither；nor

    C

    either；or

    D

    not only；but also


    正确答案： A
    解析： 暂无解析

  • 第4题：

    单选题
    When the bearing becomes dry from lack of oil, the motor shaft may heat to （）an extent （） it welds itself to the bearing.
    A

    either；or

    B

    neither；nor

    C

    such；that

    D

    so；that


    正确答案： D
    解析： 暂无解析

  • 第5题：

    单选题
    In a compression refrigeration plant the refrigerant flows from the expansion valve and through the （） where it absorbs heat from the space being cooled and becomes a gas or vapor.
    A

    compressor

    B

    condenser

    C

    throttle valve

    D

    evaporator


    正确答案： D
    解析： 暂无解析

  • 第6题：

    单选题
    A definite advantage of using water as a fire extiguishing agent is its characteristic of（）.
    A

    alternate expansion and contraction as water in a liquid state becomes a vapor

    B

    absorption of smoke and gases as water is converted from a liquid to a vapor

    C

    rapid contraction as water is converted from a liquid to a vapor

    D

    rapid expansion as water absorbs heat and changes to steam


    正确答案： B
    解析： 暂无解析

  • 第7题：

    问答题
    Practice 1　　Extremely hot weather is common in many parts of the world. Although hot weather just makes most people feel hot, it can cause serious medical problems even death. Floods, storms, volcano eruptions and other natural disasters kill thousands of people every year. (1)______ Experts say heat may be nature’s deadliest killer. Recently, extreme heat was Named for killing more than one hundred people in India It is reported that the total heat of a hot day or several days can affect health. (2) ______ Experts say heat waves often become dangerous when the nighttime temperature does not drop much from the highest daytime temperature. This causes great stress on the human body.　　(3) ______ Stay out of the sun, if possible. Drink lots of cool water: Wear light colored clothing made of natural materials; avoid wearing synthetic clothing. Make sure the clothing is loose, permitting freedom of movement. And learn the danger signs of the medical problems, such as headache and vomiting, that are linked to heat. (4) ______ The pain is a warning that the body is becoming too hot. Doctors say those suffering headache or muscle pain should stop all activity and rest in a cool place and drink cool liquids. Do not return to physical activity for a few hours because more serious conditions could develop.　　Doctors say some people face an increased danger from heat stress. (5) ______　　Hot weather also increases dangers for people who must take medicine for high blood pressure, poor blood flow, nervousness or depression.[A] Such persons have a weak or damaged heart, high blood pressure, or other problems of the blood system.[B] Several of these conditions are present at the same time.[C] Most people suffer only muscle pain as a result of heat stress.[D] Several hot days are considered a heat wave.[E] So does extreme heat.[F] Doctors say people can do many things to protect themselves from the dangers of extreme heat.[G] Heat can be both beneficial and dangerous.

    正确答案： 1.E 根据“...heat may be nature’s deadliest killer”可知,后面一句讲高温时最大的杀手,故该句需要讲高温的问题。E选项“高温也是如此”正确。
    2.D 根据Experts say heat waves often become dangerous可知,后面的句子说到热浪的危险,故该句需要对热浪下定义。D选项“连续几天的高温就称之为热浪”正确。
    3.F 第二段列举了许多保护自己免受高温伤害的方法。故该句需要概括大意。选项F“人们有多种办法保护自己”正确。
    4.C 根据The pain is a warning that the body is becoming too hot.可知,后一句讲疼痛时身体对过高温度的警告,故该句也是围绕疼痛展开的,C选项“许多人因高温的压力而不得不忍受肌肉上的疼痛”正确。
    5.A 根据Doctors say some people face an increased danger from heat stress.可知,前面的句子意思为:某些人在热浪期间特别危险。故该句需要要回答是那些人特别危险。A选项“这些人往往心脏不好,有高血压或者其他疾病”正确。
    解析： 暂无解析

  • 第8题：

    单选题
    The heat used to change a liquid to a vapor is called （）.
    A

    latent heat of fusion

    B

    latent heat of vaporization

    C

    specific heat of vaporization

    D

    latent heat of the gas


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    The amount of heat released by steam when it changes to water at the same temperature is called（）.
    A

    latent heat of condensation

    B

    latent heat of vaporization

    C

    latent heat of saturation

    D

    sensible heat of condensation


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    Physical exertion on the part of a person who has fallen into cold water would（）.
    A

    be the best thing to try if there was no rescue in sight

    B

    increase survival time in the water

    C

    increase the rate of heat loss from the body

    D

    not affect the heat loss from the body


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    We learn from the passage that ______.
    A

    all living things on the earth depend on the sun for their food

    B

    a forest looks dark in winter because it absorbs solar energy

    C

    only 0.023 of the energy from the sun is made use of on the earth

    D

    greenhouse gases allow heat energy to escape from the earth’ s surface


    正确答案： A
    解析：
    根据第一段Sunlight also provides the energy used by green plants to make their own food，阳光给绿色植物提供能量使其生产自己的食物，故选A。

  • 第12题：

    单选题
    Since heat will not flow freely from a body at a （） temperature to another at a （） temperature, it is necessary to expend mechanical work, heat, or electrical energy from an external source to achieve refrigeration.
    A

    lower；higher

    B

    shallower；deeper

    C

    larger；smaller

    D

    higher；lower


    正确答案： C
    解析： 暂无解析

  • 第13题：

    共用题干
    How the Body Keeps the Same Temperature

    The temperature of your body should always be the same if you are fine,no matter whether the weather
    is hot or cold.That is why the doctor tests your temperature with a thermometer when you are sick.Normally,
    your body teniperature is ninety-eight point six degrees Fahrenheit.If it is_______(51)than that,it is a
    stire sign that something is wrong with your body.
    Your body keeps the same temperature all the time,because it balances the heat it produces and the
    heat it_______(52)off. It is always burning up food and producing heat.It can produce heat faster
    when the body needs or give off heat faster when the body becomes too warm.Let's see_______(53)
    this works.
    The heat of your body is given off chiefly through the skin.When you feel_______(54),your skin
    is tight and shows"goose flesh".When you feel chilly,you must_______(55)around to keep warm.
    _______(56)your muscles begin to work,bum up fuel and produce more heat.It is not_______(57)to
    shiver,so you usually prefer warming up by taking exercise,or put_______(58)more clothes to keep
    warm。
    When you get warm,the skin is loose and soft. It is so supplied_______(59)blood that heat is giv-
    en off rapidly. If you get too warm,you begin to sweat and_______(60)body heat is used in evaporating
    the, moisture in your body.In warm_______(61)or warm rooms,you wear less clothing,
    _______ (62)heat can be given off freely. You prefer less exercise because your body is warm_______(63),and
    the extra heat produced by taking too much exercise makes you uncomfortable.
    Now you see why you_______(64)differently in different kinds of weather. In summer,when it is
    hot,you feel tired and lazy.You do not care to work or play,but enjoy lying down and doing nothing. When
    you get out of door in winter,the cold air makes you feel_______(65).You want to run and play.

    _________(56)
    A:However
    B:While
    C:Then
    D:Therefore

    答案：C
    解析：
    前面的内容讲的是，体温要保持一定的稳定性，人的身体才会健康。由此可推断，体温过高或过低都说明人的身体出现了问题。结合选项可知选D。
    give off意为“发出，放出（气味、热等）";put off意为“推迟”;show off意为“炫耀”;keep off意为“使……远离”。结合句意应选A。
    前面简单提到我们的身体需要热量的时候就能产生热量，我们的身体变得太暖和的时 候就会很快地释放热量。根据上下文可知，这里是一个过渡的句子，意为“让我们看看这是怎 么工作的”。故选A。
    结合常识可知，当你感到冷的时候，会起鸡皮疙瘩。因此选D。
    make做；eat吃；work工作；jump跳。这里说的是如果你感到很冷，你必须要跳来跳去 来取暖。故选D。
    前面提到跳来跳去来取暖，那么接着肌肉就开始工作了。then表示“接着”，符合句意。
    结合常识可知，颤抖是不令人愉快的，且后面的句子中有prefer，因此应选B。
    put on意为“穿上”，符合句意。
    supply with意为“提供……”，为固定搭配，符合句意。
    more更多的；enough足够的；many很多little很少。此句意为：更多的身体热量用来蒸 发身体里的水分。因此选A。
    weather天气；climate气候；circumstance条件，状况；environment环境。结合句意应 选A。
    or否则；so that以便；but但是；and和。结合句意应选B。
    本句的意思是：你喜欢少运动是因为你的身体足够的暖和。因此选C。
    根据后面讲的夏天和冬天的感受可知，这里应选feel,
    结合上下文的意思可知，夏天人们喜欢躺在床上什么也不做，而在冬天人们通过运动 来取暖。由此可知，在冬天人们显得生机勃勃。

  • 第14题：

    Which of the following is the MOST critical component related to removing heat from the CPU?（）

    • A、Vented case
    • B、Number of fans
    • C、Thermal paste
    • D、Liquid cooling

    正确答案:C

  • 第15题：

    单选题
    The rate of heat transfer from a hot region to a cold region is affected most by the （）.
    A

    size of the heat sink

    B

    temperature difference between the regions

    C

    size of the heat source

    D

    total heat of the system


    正确答案： C
    解析： 暂无解析

  • 第16题：

    单选题
    The heat removed from the refrigerant in the condenser of a refrigeration plant is the （）
    A

    latent heat of expansion

    B

    sensible heat of condensation

    C

    heat of compression

    D

    all of the above


    正确答案： C
    解析： 暂无解析

  • 第17题：

    单选题
    A fluid coil will （） large quantifies of heat when it changes state from a liquid to a vapor.
    A

    release

    B

    absorb

    C

    develop

    D

    regenerate


    正确答案： A
    解析： 暂无解析

  • 第18题：

    单选题
    The heat required to change a substance from a liquid to a gas without experiencing a temperature change is defined as the latent heat of （）.
    A

    fusion

    B

    vaporization

    C

    sublimation

    D

    condensation


    正确答案： B
    解析： 暂无解析

  • 第19题：

    单选题
    Changing from solid to liquid, water takes in heat from all substances near it, and this _____ produces artificial cold surrounding it.
    A

    absorption

    B

    transition

    C

    consumption

    D

    interaction


    正确答案： D
    解析：
    句意：从固体变成液体的过程中，水从它周围的物质中吸收热量，而这一吸收过程又向周围产生了冷气。absorption吸收。transition传递，过渡。consumption消耗；消费。interaction相互作用。

  • 第20题：

    单选题
    The heat required to change a substance from a solid to a liquid while at its freezing temperature, is known as the latent heat of （）.
    A

    fusion

    B

    vaporization

    C

    condensation

    D

    sublimation


    正确答案： C
    解析： 暂无解析

  • 第21题：

    单选题
    When I go to heat the milk, please_____the baby.
    A

    keep an eye on

    B

    set foot on

    C

    make a guess at

    D

    look forward to


    正确答案： A
    解析：

  • 第22题：

    单选题
    What is the purpose of sub cooling R-12 in the condenser?（）
    A

    to increase the system efficiency by sensible heat transfer

    B

    to stop the liquid from flashing

    C

    to reduce the load on the compressor

    D

    to remove latent heat of vaporization and the suction piping transfer


    正确答案： A
    解析： 暂无解析

  • 第23题：

    单选题
    CO2 extinguishes a fire by （）.
    A

    a blanket of bubbles formed on the surface of the fire

    B

    smothering

    C

    cooling

    D

    isolating the heat from the fuel


    正确答案： C
    解析： 暂无解析

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