单选题Rainfall is the main _____ of water supply in that area.A kindB sortC sourceD resource

题目
单选题
Rainfall is the main _____ of water supply in that area.
A

kind

B

sort

C

source

D

resource

相似考题

1.The water supply will give()at the end of this week.A、offB、outC、inD、away

2.The text is mainly about .A.water supply and increasing populationB.water use management and agricultureC.water redistribution and wildlife protectionD.water shornages and environmental protection.

3.Our water supply was ____ because of the pipe burst.A、cut downB、cut offC、cut awayD、cut up

4.EThe need to feed a growing population is putting much pressure on the world’s supply of water. With 97% of the world’s water too salty to be drunk or used in agriculture, the worldwide supply of water needs careful management, especially in agriculture. Although the idea of a water shortage（短缺）seems strange to someone fortunate enough to live in a high rainfull country, many of the world’s agricultural industries experience constant water shortages.Although dams can be built to store water for agricultural use in dry areas and dry seaons, the costs of water redistribution(重新分配)are very high. Notonly is there the cost of the engineering itself, but there is also an environmental cost to be considered. Where valleys(山谷)are flooded to create dams, houses are lost and wildlife homes destroyed. Besides, water many flow easily through pipes to fields,but it cannot be transported from one side of the world to the other. Each country must therefore rely on the management of its own water to supply its farming requirements.This is particularly troubling ro countries with agricultural industries in areas dependent on irrigation（灌溉）. In Texas, farmers’ overuse of irrigation water be resulted in a 25% redcution of the water stores. In the Central Valley area of south eastern USA, a huge water engineering project provided water for farming in dry vallege, but much of the water use has been poorly managed.Saudi Arabia’s attempts to grow wheat in desert areas have been the pumping of huge quantities of irrigation water from underground reserves. Because there is no rainfall in these areas, such reserves can only decrease, and it is believed that fifty years of pumping will see them run dry.72. From the first two paragraphs we learnt that _______.A.much of the world’s water is available for useB.people in high rainfll countries feel luckyC.the costs of water redistribution should be consideredD.water can be easily carried through pipes across the world

参考答案和解析
正确答案： C
解析：
句意：在那个地区，降雨是主要的供水来源。source意为“来源”。resource意为“资源，财力”。
更多“Rainfall is the main _____ of water supply in that area.”相关问题

  • 第1题：

    One of the reasons that causes oil flowed from sludge outlet of a self-cleaning purifier is

    A.seal water supply be cut off

    B.make-up water supply be cut off

    C.oil outlet valve closed or not open sufficiently

    D.the flow rate of oil is too much


    正确答案：B

  • 第2题：

    The blowers of an inert gas generation system aboard a tanker，will be automatically secured if ______．

    A.Normal water supply at the water seal is lost

    B.The temperature of the inert gas being delivered to the cargo tanks is more than 150℉

    C.The cooling water supply to the scrubbers is lost

    D.All of the above


    正确答案：D

  • 第3题：

    共用题干
    第一篇

    Water Resources on the Earth

    The second most important constituent（构成成分）of the biosphere（生物圈）is liquid water. This can only exist in a very narrow range of temperatures,since water freezes at 0℃and boils a 100℃．Life as we know it would only be possible on the surface of a planet which had temperature: somewhere within this narrow range.
    The earth's supply of water probably remains fairly constant in quantity.The total quantity of water is not known very accurately,but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers.Most of it is in the form of the salt water of the oceans一about 97 percent. The rest is fresh.But three-quarters of this is in the form of ice at the poles and or mountains and cannot be used by living systems until melted.Of the remaining fraction,which h somewhat less than one percent of the whole.There is 10—20 times as much stored underground water as there is actually on the surface.There is also a tiny,but extremely important fraction of the water supply which is present as water vapour in the atmosphere.
    Water vapour in the atmosphere is the channel through which the whole water circulation（循环） of the biosphere has to pass.Water evaporated（蒸发）from the surface of the oceans,from lakes and rivers and from moist（潮湿的）earth is added to it. From it the water comes out again as rain or snow,falling on either the sea or the land. There is,as might be expected, a more intensive evaporation per unit area over the sea and oceans than over the land,but there is more rainfall over the land than over the oceans and the balance is restored by the run off from the land in the form of rivers.

    There is more of rainfall________.
    A:over the mountains than over the rivers
    B:over the rivers than over the mountains
    C:over the land than over the oceans
    D:over the oceans than over the land

    答案：C
    解析：
    文章第一段的第二句讲到液态水“only exist in a very narrow range of temperatures"，虽然B（我们星球的表面）也有点道理，但是液态水对温度的要求很高，并非地球的所有表面都有液态水存在，所以答案D正确。
    第二段第一句提到地球上水的供给“remains fairly constant in quantity"，数量上是恒定的，它就没有增加也不会减少，只不过会以不同的形态出现，所以选择B（保持不变）。
    问题是“地球上绝大部分淡水以什么形式出现？”第二段中间提到淡水时，说到“three-quarters of this is in the form of ice at the poles and on mountains"，即3/4的淡水以冰的形式存在于两极和高山中，后面提到剩余部分的淡水存在于地下，但占比少于1%,所以选项A正确。
    词义辫析题， fraction有“小部分”的意思，考虑到前面提到地球97％的水以海洋咸水的形式存在，剩下的3％则以冰的形式存在于两极和高山，余下的自然不多，所以选B。
    第三段的最后一句说到“there is more rainfall over the land than over the oceans”，陆地的降雨比海洋要多，但没有提到河流和山脉的降雨比较，所以C正确。大气中的水蒸气是整个生物圈的水循环必经的途径。水从海洋的表面、湖泊、河流和潮湿的泥土中蒸发出来并补充到大气中。水以雨或雪的形式再次出现，降落在海洋或陆地上。可以预料到的是，海洋上空每单位面积的水蒸气比在陆地上空更为密集，但是，陆地比海洋有更多的降雨，水在陆地上以河流的形式流出以保持水资源的平衡。

  • 第4题：

    单选题
    The main purpose of starting the diesel engine on air briefly is（）
    A

    to inspect if the cylinder has the water leakage

    B

    to expel out the residual water/gas/oil from the cylinder

    C

    to check if fuel supply is normal

    D

    A and B


    正确答案： D
    解析： 暂无解析

  • 第5题：

    单选题
    A water pump can not supply water after startingIt may be caused by （）.
    A

    closed discharge valve

    B

    broken pipe line

    C

    worn shaft

    D

    both A and B


    正确答案： D
    解析： 暂无解析

  • 第6题：

    单选题
    Where is the cooling water from the compensating tank in the cooling water system of main engine lead to?（）
    A

    discharge side of the centrifugal pump

    B

    suction side of the centrifugal pump

    C

    the lowest point of the cooling water system

    D

    inlet of the main engine


    正确答案： D
    解析： 暂无解析

  • 第7题：

    单选题
    What is the main advantage of a rain barrel system?
    A

    It benefits the Earth by recycling water.

    B

    Its efficiency increases in areas with little rainfall.

    C

    It utilizes technology that is centuries old.

    D

    It results in lower utility payments.


    正确答案： C
    解析：
    在第二段第一句“the most attractive aspect of rain barrel systems for many people is the potential monthly savings on water and wastewater bills”提到该系统可以节省水费。故D项符合题意。

  • 第8题：

    单选题
    After resolving the trouble of main power supply, main switch of emergency generator should（）, if power supply is refreshed.
    A

    be switched off by the duty officer

    B

    be switched on by the duty officer

    C

    be switched off automatically

    D

    be switched on automatically


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    The fuel from the bunker tanks must be treated by before entering the service tanks（）, from where the fuel enters（）
    A

    centrifugal separators; the engine cylinder

    B

    oily water separators; the engine cylinder

    C

    oily water separators; the fuel supply system

    D

    centrifuges; the fuel supply system


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    One of the reasons that causes oil flowed from sludge outlet of a self-cleaning purifier is （）
    A

    seal water supply be cut off

    B

    make-up water supply be cut off

    C

    oil outlet valve closed or not open sufficiently

    D

    the flow rate of oil is too much


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    If separating effect is not good, we can improve it by （）
    A

    flushing separator with hot water

    B

    increasing water supply flow

    C

    heat oily water properly

    D

    opening manual oil discharge value


    正确答案： A
    解析： 暂无解析

  • 第12题：

    单选题
    The blowers of an inert gas generation system aboard a tanker，will be automatically secured if（）.
    A

    normal water supply at the water seal is lost

    B

    the temperature of the inert gas being delivered to the cargo tanks is more than 150°F

    C

    the cooling water supply to the scrubbers is lost

    D

    all of the above


    正确答案： C
    解析： 暂无解析

  • 第13题：

    Please supply 200 tons of fresh water ______ my ship．

    A.with

    B.in

    C.to

    D.on


    正确答案：C

  • 第14题：

    共用题干
    第一篇

    Water Resources on the Earth

    The second most important constituent（构成成分）of the biosphere（生物圈）is liquid water. This can only exist in a very narrow range of temperatures,since water freezes at 0℃and boils a 100℃．Life as we know it would only be possible on the surface of a planet which had temperature: somewhere within this narrow range.
    The earth's supply of water probably remains fairly constant in quantity.The total quantity of water is not known very accurately,but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers.Most of it is in the form of the salt water of the oceans一about 97 percent. The rest is fresh.But three-quarters of this is in the form of ice at the poles and or mountains and cannot be used by living systems until melted.Of the remaining fraction,which h somewhat less than one percent of the whole.There is 10—20 times as much stored underground water as there is actually on the surface.There is also a tiny,but extremely important fraction of the water supply which is present as water vapour in the atmosphere.
    Water vapour in the atmosphere is the channel through which the whole water circulation（循环） of the biosphere has to pass.Water evaporated（蒸发）from the surface of the oceans,from lakes and rivers and from moist（潮湿的）earth is added to it. From it the water comes out again as rain or snow,falling on either the sea or the land. There is,as might be expected, a more intensive evaporation per unit area over the sea and oceans than over the land,but there is more rainfall over the land than over the oceans and the balance is restored by the run off from the land in the form of rivers.

    The word"fraction"in the second paragraph means________.
    A:a large area
    B:a very small amount
    C:an important system
    D:a major source of information

    答案：B
    解析：
    文章第一段的第二句讲到液态水“only exist in a very narrow range of temperatures"，虽然B（我们星球的表面）也有点道理，但是液态水对温度的要求很高，并非地球的所有表面都有液态水存在，所以答案D正确。
    第二段第一句提到地球上水的供给“remains fairly constant in quantity"，数量上是恒定的，它就没有增加也不会减少，只不过会以不同的形态出现，所以选择B（保持不变）。
    问题是“地球上绝大部分淡水以什么形式出现？”第二段中间提到淡水时，说到“three-quarters of this is in the form of ice at the poles and on mountains"，即3/4的淡水以冰的形式存在于两极和高山中，后面提到剩余部分的淡水存在于地下，但占比少于1%,所以选项A正确。
    词义辫析题， fraction有“小部分”的意思，考虑到前面提到地球97％的水以海洋咸水的形式存在，剩下的3％则以冰的形式存在于两极和高山，余下的自然不多，所以选B。
    第三段的最后一句说到“there is more rainfall over the land than over the oceans”，陆地的降雨比海洋要多，但没有提到河流和山脉的降雨比较，所以C正确。大气中的水蒸气是整个生物圈的水循环必经的途径。水从海洋的表面、湖泊、河流和潮湿的泥土中蒸发出来并补充到大气中。水以雨或雪的形式再次出现，降落在海洋或陆地上。可以预料到的是，海洋上空每单位面积的水蒸气比在陆地上空更为密集，但是，陆地比海洋有更多的降雨，水在陆地上以河流的形式流出以保持水资源的平衡。

  • 第15题：

    给水站 water supply station


    正确答案: 为机车上水的中间车站。

  • 第16题：

    单选题
    If separating effect is not good, which measure should be taken （）
    A

    working at intervals and properly heating

    B

    warming up to 70℃, increase water supply flow

    C

    improving impulse of water supply

    D

    reducing water supply flow


    正确答案： A
    解析： 暂无解析

  • 第17题：

    单选题
    Please supply my vessel（）300 tons of fresh water.
    A

    with

    B

    on

    C

    by

    D

    for


    正确答案： C
    解析： 暂无解析

  • 第18题：

    填空题
    The water cycle is responsible for clouds, rain and our supply of drinking water.____

    正确答案： I
    解析：
    根据题干信息“water cycle”可以定位到I段“The water cycle is responsible for clouds and rain as well as our supply of drinking water.”，故匹配段落为I。

  • 第19题：

    单选题
    Normally，potable water systems are connected directly to the（）.
    A

    fire-main system

    B

    feed-water system

    C

    freshwater sanitary system

    D

    domestic water tank


    正确答案： D
    解析： 暂无解析

  • 第20题：

    单选题
    When distilling salt water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.
    A

    to cut down the amount of cooling water needed

    B

    to prevent an excess amount of cooling water from being discharged to the bilges

    C

    to supply hot water to the evaporator for more economical operation

    D

    None of the above is tree


    正确答案： A
    解析： 暂无解析

  • 第21题：

    单选题
    One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）
    A

    seal water supply be cut off

    B

    make up water supply be cut off

    C

    oil outlet valve closed or not open sufficiently

    D

    the flow rate of oily water is too much


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    Rainfall is the main ______ of water supply in that area.
    A

    kind

    B

    sort

    C

    source

    D

    resource


    正确答案： B
    解析：
    句意：在那个地区，降雨是主要的供水来源。source意为“来源”，如Bad food is a source of illness. 意为“坏了的食物是疾病之源。”此题容易误选与C项拼写相近的D项：resource，意为“资源，财力”，如natural resources意为“自然资源”。

  • 第23题：

    单选题
    In order to raise the efficiency of the water supply, measures should be taken to _____.
    A

    centralize the management of water resources

    B

    increase the sense of responsibility of agencies at all levels

    C

    guarantee full protection of the environment

    D

    encourage local and regional control of water resources


    正确答案： A
    解析：
    推断题。本题询问提高供水效率的方式。文章最后说，国家建立中心权力机构来协调关于水的方针政策，与A项的“水资源的集中管理”是一致的，故A为答案。

  • 第24题：

    单选题
    Which of the following conditions may need to be reduced when operating a large, low speed, main propulsion, diesel engine at low loads?（）
    A

    Injection pressures

    B

    Control air supply pressure

    C

    Cooling water flow through after-coolers

    D

    Lube oil temperature


    正确答案： D
    解析： 暂无解析

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