There()three plants in the corners of the room.A、isB、areC、have

题目

There()three plants in the corners of the room.

  • A、is
  • B、are
  • C、have

相似考题

4.CPlants can’t communicate by moving or making sounds, as most animals do. Instead, plants produce volatile compounds, chemicals that easily change from a liquid to a gas. A flower’s sweet smell, for example, comes from volatile compounds that the plant produces to attract insects such as bugs and bees.Plants can also detect volatile compounds produced by other plants. A tree under attack by hungry insects, for instance, may give off volatile compounds that let other trees know about the attack, In response, the other trees may send off chemicals to keep the bugs away- or even chemicals that attract the bugs’ natural enemies.Now scientists have created a quick way to understand what plants are saying: a chemical sensor(传感器) called an electronic nose. The “e-nose” can tell compounds that crop plants make when they’re attacked. Scientists say the e-nose could help quickly detest whether plants are being eaten by insects. But today the only way to detect such insects is to visually inspect individual plants. This is a challenging task for managers of greenhouses, enclosed gardens that can house thousands of plants.The research team worked with an e-nose that recognizes volatile compounds. Inside the device, 13 sensors chemically react with volatile compounds. Based on these interactions, the e-nose gives off electronic signals that the scientists analyze using computer software.To test the nose, the team presented it with healthy leaves from cucumber, pepper and tomato plants, all common greenhouse crops. Then the scientists collected samples of air around damaged leaves from each type of crop. These plants had been damaged by insects, or by scientists who made holes in the leaves with a hole punch (打孔器).The e-nose, it turns out, could identify healthy cucumber, pepper and tomato plants based on the volatile compounds they produce. It could also identify tomato leaves that had been damaged. But even more impressive, the device could tell which type of damage – by insects or with a hole punch – had been done to the tomato leaves.With some fine tuning, a device like the e-nose could one day be used in greenhouses to quickly spot harmful bugs, the researchers say. A device like this could also be used to identify fruits that are perfectly ripe and ready to pick and eat, says Natalia Dudareve, a biochemist at Purdue University in West Lafayette, Ind. who studies smells of flowers and plants. Hopefully, scientists believe, the device could bring large benefits to greenhouse managers in the near future.49. We learn from the text that plants communicate with each other by______.A. making some sounds B. waving their leavesC. producing some chemicals D. sending out electronic signals

更多“There()three plants in the corne”相关问题
  • 第1题:

    The students must finish the test in().

    A、three quarters of an hour time

    B、three quarter's of an hour time

    C、three quarters of an hour's time

    D、three quarters'of an hour's time


    正确答案: C

  • 第2题:

    Plants can ____ inorganic matter.

    A: live by

    B: live on

    C: live with

    D: live up to


    参考答案:B

  • 第3题:

    most of australia’s unique plants and animals are imported from other continents. ()


    参考答案:错误

  • 第4题:

    24. The reason why most plants can’t grow on the sandy beach is that

    A. there isn't enough sunlight

    B. there is too much water

    C. it is too crowded there

    D. it has little food for plants


    正确答案:D
    24.D【解析】由文章最后一句可知沙滩里没有植物生长所需要的养分。

  • 第5题:

    共用题干
    Microchip Research Center Created
    A research center has been______(51)in this Far Eastern country to develop advanced microchip production technology.The center,which will start out with about US$14 million,will help the country develop its chip industry without always depending on imported technology.
    The center will make use of its research skills and______(52)to develop new technology for _______(53)chip plants.The advent of the center will possibly free the country from the_______(54) that it is always buying almost-outdated technologies from other countries,said the country's flagship chipmaker.______(55),chip plants in this country are in a passive situation because many foreign governments don't allow them to______(56)the most advanced technologies,fearing they will be used for______(57) purposes.Moreover,the high licensing fees they have to pay to technology providers are also an important _(58)for their decision of self-reliance.
    As mainstream chip production technology______(59)from one generation to the next every three to five years,plants with new technology can make more powerful chips at lower costs,while plants with______(60)equipment,which often cost billions of dollars to build,will be______(61)by the maker.
    More than 10 chip plants are being built,each costing millions of US dollars.The majority of that money goes to overseas equipment______(62)and technology owners-mainly______(63)Japan and Singapore.
    Should the new center play a major role in improving the situation in the industry,the country admits the US $14 million investment is still rather small.This country is developing______(64)technologies.Most of the investment will be spent on setting_______(65)with technology and intellectual property owners.

    60._________
    A:outdated
    B:outgoing
    C:outward
    D:fashionable

    答案:A
    解析:
    研究中心的建立应该用set up(建立,设立,创办)来表示,其他选项都不能表示建立的意思。make up组成,弥补,化妆,编造;put up举起,张贴,提高;hold up举起,支撑。
    研究中心研发新技术,用的应该是研究技巧和相关设施。facility设施,设备;furniture家具;faculty能力,才能,全体教职工;factory工厂,制造厂。
    根据常理可知,研究中心研究新科技,服务的对象应该是国内的芯片厂。docile温顺的,驯服的;domestic家用的,国内的;domicile住所,永久住处,定居地;foreign国外的。
    本句中that引导的定语从句表明,远东国家的芯片厂从别国购买几乎过时的技术。这是一种处境或者情况,选项中只有situation能表达这个意思。sight景物,景象;skeleton骨架,骨骼,梗概;scene场面,现场,景象。
    结合上下文可知,该句描述的是目前芯片厂的处境,因此选择D项。traditionally传统上;surpnsingly令人吃惊地,令人惊讶地;conventionally按照惯例,照老例;currently目前,当前。
    根据常理可知,外国政府不允许别的国家从他们国家进口最先进的技术。外国政府不能阻止别的国家发明或创造先进技术,而别的国家又没有先进技术可供出口,根据排除法也可知D项正确。create创造;export出口;invent发明;import进口。
    外国政府之所以不让别的国家进口最先进的技术,是因为害怕他们用于军事目的。military军事的,军用的;social社会的,社交的;industrial工业的,产业的;economic经济的,经济学的。
    reason后跟for表示“……的原因”。根据空格后的介词for可知,高额的licensing fees是他们决定是否依靠自己的原因之一。affect影响,假装,感动;effect影响,效果,印象;result结果,后果;reason原因,理由。
    该分句主要讲的是主流芯片生产技术的更新换代,四个选项中只有shift能够表示技术的更新换代。transport运送,运输;control控制;shift(意见、情况、政策)有所变动,变换,改变,常与from…to…连用;turn转动,旋转。
    根据空格前一句中的“new technology”与转折连词“while",可知空格处的词的意思与new相对,只有outdated符合条件。outdated过时的,旧时的,落伍的;outgoing爱交际的,友好的,外向的;outward向外的,朝外面的;fashionable流行的,时尚的,时髦的。
    由常理可知,设备落伍的工厂将被边缘化。march前进,进军,进展;marginalize使处于社会的边缘,忽视,排斥;mark做标记,留下痕迹;smash粉碎,撞击,打碎。
    大部分钱财应该是流向海外的设备经销商,vendor有“商贩,经销商”的意思。venture冒险,冒险事业,冒险行动;buyer买家,买主,买方;customer客户,主顾。
    该句子主要对设备供应商和技术拥有者的国籍进行说明,用from来表示这些人来自日本和新加坡。to向,朝着,表示方向;on在……之上,表示位置;from来自……,表示来源;about关于,表示对象。
    这个句子的大意是:这个国家正在发展综合技术。comprehensive全面的,综合的;perspective透视画法;aggressive好斗的,挑衅的;conclusive决定性的,确凿的。
    这个句子的大意是:大部分投资将用于与技术人员和知识产权所有者建立联盟。agreement协定,协议;motivation动力,动机;together同时,在一起;alliance同盟,联盟,联姻。

  • 第6题:

    Next week, the German Chancellor will come to China for a___________visit.

    A.three days
    B.three-day
    C.three day's
    D.three-days

    答案:B
    解析:
    句意为“下周,德国总理将来中国进行为期三天的访问。”“为期三天”的正确写法应该是B项。故选B。

  • 第7题:

    共用题干
    “Salty” Rice Plant Boosts Harvests
    British scientists are breeding a new generation of rice plants that will be able to grow in soil containing salt water. Their work may enable abandoned farms to become productive once more.
    Tim Flowers and Tony Yeo,from Sussex University's School of Biological Sciences,have spent several years researching how crops,such as rice,could be made to grow in water that has become salty.
    The pair have recently begun a three-year programme,funded by the Biotechnology and Biological Sciences Research Council,to establish which genes enable some plants to survive salty conditions. The aim is to breed this capability into crops,starting with rice.
    It is estimated that each year more than 10m hectares(公顷)of agricultural land are lost because salt gets into the soil and stunts(妨碍生长)plants. The problem is caused by several factors. In the tropics , mangroves(红树林)that create swamps(沼泽)and traditionally formed barriers to sea water have been cut down .In the Mediterranean,a series of droughts have caused the water table to drop,allowing sea water to seep(渗透)in. In Latin America , irrigation often causes problems when water is evaporated(蒸发)by the heat , leaving salt deposits behind.
    Excess salt then enters the plants and prevents them functioning normally.Heavy concentrations of minerals in the plants stop them drawing up the water they need to survive.
    To overcome these problems,Flowers and Yeo decided to breed rice plants that take in very little salt and store what they do absorb in cells that do not affect the plants' growth.They have started to breed these characteristics into a new rice crop,but it will take about eight harvests before the resulting seeds are ready to be considered for commercial use.
    Once the characteristics for surviving salty soil are known,Flowers and Yeo will try to breed the appropriate genes into all manners of crops and plants.Land that has been abandoned to na- ture will then be able to bloom again,providing much needed food in the poorer countries of the world.

    Flowers and Yeo have started a program______.
    A: to find ways to prevent water pollution
    B: to identify genes that promote growth in salty soil
    C: to breed rice plants that taste salty
    D: to find ways to remove excessive salt from soil

    答案:B
    解析:
    第二段的第一句话把两位研究人员Tim Flowers和Tony Yeo的关系讲得很清楚,他们来自同一所大学Sussex University的School of Biological Sciences,故是同事。从上下文看他们不可能是学生,更不会是种水稻的;第三段的第一句里用了pair这个词,但pair不一定就是夫妻,从他们的名字看他们不是同一个姓,而且Tim和Tony都是男性的名字。


    本题的答案可以在第三段里找到,这段的第一句话说他们开始了一个为期3年的研究项目,目的是“establish which genes enable some plants to survive salty condition”(确认哪些基因使得某些作物能在含盐的条件下生长)。这和选项B是同一个意思。


    引起盐分渗入土壤的3个原因都在第四段里谈到了:第一是阻档海水的天然屏障红树林被砍伐(A);第二是在地中海地区严重的旱灾导致水平面下降,海水渗透(B); 第三是在拉丁美洲,水分被高温蒸发后留下了盐分(D)。


    affect这个动词的意思是“影响”,和influence是同义词,在这个上下文里可以替换用。


    四个选项的意思分另,1是:肯定的(positive)、否定的(negative)、有怀疑的(suspicious)、冷淡的(indifferent),从全文看作者时他们的研究无疑是肯定的。

  • 第8题:

    There()three plants in the corners of the room.

    Ais

    Bare

    Chave


    B

  • 第9题:

    单选题
    Which of the following is NOT among the solutions to the lack of sewage water treatment plants?
    A

    Cooperation with other organizations.

    B

    Cooperation with the World Bank.

    C

    Two projects about treatment plants for sewage waters in Vlore and Pogradec.

    D

    To control the waste water discharged.


    正确答案: B
    解析:
    推理判断题。文章末段描述了污水处理问题及解决问题的办法,其中提到了A、B、C三项,但是D“控制排放的废水”并没有涉及到,所以正确答案是D。

  • 第10题:

    多选题
    Consider each of the choices separately and select all that apply.  Which of these can be inferred from the fact that the French built orangeries for certain tropical plants?
    A

    Greenhouses may be used to keep plants at a moderate temperature

    B

    The climate of France is unsuited to growing tropical plants outdoors.

    C

    Louis ⅩⅣ was a frequent and enthusiastic traveler to Africa and Asia


    正确答案: C,A
    解析:
    有原文可知,法国人修建“orangeries”(温室)是为了保护热带植物,所以A和B选项都是合理的推测,但这没有暗示Louis X IV亲自寻找过异域的水果,C选项排除。

  • 第11题:

    单选题
    Why does the author call lichens pioneers?
    A

    Because they developed so early in the history of the planet.

    B

    Because of their primitive structure.

    C

    Because they prepare soil for other plants.

    D

    Because they were the first plants to live in Antarctica.


    正确答案: A
    解析:
    细节题。题干中的关键词为pioneers,该词出现在第一段最后一句,该句中的伴随状语提到appearing in barren rocky areas and starting the formation of soil in which mosses, then ferns, and then other plants can take root (它们在贫瘠的多岩石地区生长,开始了土壤的形成,之后各种植物才得以据此生根),由于前一句指出(地衣是生长在南极洲的植物之一),可知选项C(它们是首先在南极洲生存的植物)符合文意。

  • 第12题:

    单选题
    The most common forms of main drive used on deck auxiliaries are ().
    A

    steam plants, electric motors and compressed air

    B

    diesel engine, hydraulic machinery and compressed air

    C

    steam plants, electric motors and hydraulic machinery

    D

    diesel engines, steam plants and hydraulic machinery


    正确答案: D
    解析: 暂无解析

  • 第13题:

    The wealthy doctor has a __________ daughter.

    A、three-years-old

    B、three years’ old

    C、three-year-old

    D、three-year old


    参考答案:C

  • 第14题:

    There ( ) three plants in the office.

    A. are

    B. is

    C. have


    正确答案:A

  • 第15题:

    A

    Why do plants grow in some places and not in others? Why does some land have so much growing on it,while other land has almost no plants growing on it at all?

    To grow plants need several things. One is warmth. In very cold places almost nothing grows. Plants also need water. In very dry parts of the earth only a few unusual plants can grow. That's why dry deserts everywhere are almost not covered by trees or grass.

    Plants must also have a place in which to f,ut down their roots and grow. They find it diffi-culr to grow on hard land. The town is built on hard land. The plants here have only the soil found between the cracks of the stones Io grow in.

    Another thing plants must have before they can grow is food.

    Whar will happen if we try to make things grow on the sandy beach? A few plants,such as beach grass,will grow in sand,L ut most plants won-t. Even if the weather is warm enough.and we water the plants each day. Many of them will die because the sand on this beach has al-most no food for plants.

    ( )21. According to the passage,plants need _________ things to grow well.

    A. two

    B. three

    C. four

    D. five


    正确答案:C
    Ⅲ.21.C【解析】通读全文可知:植物的生长需要4个条件:1.适宜的温度;2.水;3.合适的土壤;4.养分。

  • 第16题:

    B

    Scientists are trying to make the deserts into good land again. They want to,bring water to the deserts. But more and more places of the earth is becoming deserts all the time, Scientists may not be able to change the deserts. Scientists think that people make deserts. People are do-ing bad things to the earth.

    Some places on the earth don-t get very much rain. But they still don-t become deserts.This is because some green plants are growing there. Small green plants and grass are very helpful to dry places. Plants don't let the wind blow the earth away. When 8 little bit of rain falls,the plants hold the water. Without plants,the land can become a desert much more easily.

    ( )26. Why can the land become a desert?

    A. Because some places don't get very much rain.

    B. Because plants don-t let the hot sun make the earth even drier.

    C. Because people don't keep the earth well.

    D. Because scientists haven-t learnt enough about the deserts.


    正确答案:C
    26.C【解析】文章第一段提供的信息表明良田变成了沙漠是人为的。故此题选C。

  • 第17题:

    In trying to accumulate knowledge about the universe and to find common factors which underline and account for the facts that he knows,the scientist often chooses the method of the“controlled experiment.”If he wants to find out the effect of light( )growing plants,he takes many plants,as alike as possible.

    A.on
    B.of
    C.by
    D.to

    答案:A
    解析:
    on表达“对……起作用或有影响”,要用have an effect on这一固定搭配,故应选A.,其余选项均不正确。

  • 第18题:

    共用题干
    “Salty” Rice Plant Boosts Harvests
    British scientists are breeding a new generation of rice plants that will be able to grow in soil containing salt water. Their work may enable abandoned farms to become productive once more.
    Tim Flowers and Tony Yeo,from Sussex University's School of Biological Sciences,have spent several years researching how crops,such as rice,could be made to grow in water that has become salty.
    The pair have recently begun a three-year programme,funded by the Biotechnology and Biological Sciences Research Council,to establish which genes enable some plants to survive salty conditions. The aim is to breed this capability into crops,starting with rice.
    It is estimated that each year more than 10m hectares(公顷)of agricultural land are lost because salt gets into the soil and stunts(妨碍生长)plants. The problem is caused by several factors. In the tropics , mangroves(红树林)that create swamps(沼泽)and traditionally formed barriers to sea water have been cut down .In the Mediterranean,a series of droughts have caused the water table to drop,allowing sea water to seep(渗透)in. In Latin America , irrigation often causes problems when water is evaporated(蒸发)by the heat , leaving salt deposits behind.
    Excess salt then enters the plants and prevents them functioning normally.Heavy concentrations of minerals in the plants stop them drawing up the water they need to survive.
    To overcome these problems,Flowers and Yeo decided to breed rice plants that take in very little salt and store what they do absorb in cells that do not affect the plants' growth.They have started to breed these characteristics into a new rice crop,but it will take about eight harvests before the resulting seeds are ready to be considered for commercial use.
    Once the characteristics for surviving salty soil are known,Flowers and Yeo will try to breed the appropriate genes into all manners of crops and plants.Land that has been abandoned to na- ture will then be able to bloom again,providing much needed food in the poorer countries of the world.

    The attitude of the author towards the research project is______.
    A: positive
    B: negative
    C: suspicious
    D: indifferent

    答案:A
    解析:
    第二段的第一句话把两位研究人员Tim Flowers和Tony Yeo的关系讲得很清楚,他们来自同一所大学Sussex University的School of Biological Sciences,故是同事。从上下文看他们不可能是学生,更不会是种水稻的;第三段的第一句里用了pair这个词,但pair不一定就是夫妻,从他们的名字看他们不是同一个姓,而且Tim和Tony都是男性的名字。


    本题的答案可以在第三段里找到,这段的第一句话说他们开始了一个为期3年的研究项目,目的是“establish which genes enable some plants to survive salty condition”(确认哪些基因使得某些作物能在含盐的条件下生长)。这和选项B是同一个意思。


    引起盐分渗入土壤的3个原因都在第四段里谈到了:第一是阻档海水的天然屏障红树林被砍伐(A);第二是在地中海地区严重的旱灾导致水平面下降,海水渗透(B); 第三是在拉丁美洲,水分被高温蒸发后留下了盐分(D)。


    affect这个动词的意思是“影响”,和influence是同义词,在这个上下文里可以替换用。


    四个选项的意思分另,1是:肯定的(positive)、否定的(negative)、有怀疑的(suspicious)、冷淡的(indifferent),从全文看作者时他们的研究无疑是肯定的。

  • 第19题:

    共用题干
    “Salty” Rice Plant Boosts Harvests
    British scientists are breeding a new generation of rice plants that will be able to grow in soil containing salt water. Their work may enable abandoned farms to become productive once more.
    Tim Flowers and Tony Yeo,from Sussex University's School of Biological Sciences,have spent several years researching how crops,such as rice,could be made to grow in water that has become salty.
    The pair have recently begun a three-year programme,funded by the Biotechnology and Biological Sciences Research Council,to establish which genes enable some plants to survive salty conditions. The aim is to breed this capability into crops,starting with rice.
    It is estimated that each year more than 10m hectares(公顷)of agricultural land are lost because salt gets into the soil and stunts(妨碍生长)plants. The problem is caused by several factors. In the tropics , mangroves(红树林)that create swamps(沼泽)and traditionally formed barriers to sea water have been cut down .In the Mediterranean,a series of droughts have caused the water table to drop,allowing sea water to seep(渗透)in. In Latin America , irrigation often causes problems when water is evaporated(蒸发)by the heat , leaving salt deposits behind.
    Excess salt then enters the plants and prevents them functioning normally.Heavy concentrations of minerals in the plants stop them drawing up the water they need to survive.
    To overcome these problems,Flowers and Yeo decided to breed rice plants that take in very little salt and store what they do absorb in cells that do not affect the plants' growth.They have started to breed these characteristics into a new rice crop,but it will take about eight harvests before the resulting seeds are ready to be considered for commercial use.
    Once the characteristics for surviving salty soil are known,Flowers and Yeo will try to breed the appropriate genes into all manners of crops and plants.Land that has been abandoned to na- ture will then be able to bloom again,providing much needed food in the poorer countries of the world.

    Which of the following is NOT mentioned as a cause of the problem discussed in the passage?
    A: Natural barriers to sea water have been destroyed.
    B: The water table has gone down after droughts.
    C: Sea level has been continuously rising.
    D: Evaporation of water leaves salt behind.

    答案:C
    解析:
    第二段的第一句话把两位研究人员Tim Flowers和Tony Yeo的关系讲得很清楚,他们来自同一所大学Sussex University的School of Biological Sciences,故是同事。从上下文看他们不可能是学生,更不会是种水稻的;第三段的第一句里用了pair这个词,但pair不一定就是夫妻,从他们的名字看他们不是同一个姓,而且Tim和Tony都是男性的名字。


    本题的答案可以在第三段里找到,这段的第一句话说他们开始了一个为期3年的研究项目,目的是“establish which genes enable some plants to survive salty condition”(确认哪些基因使得某些作物能在含盐的条件下生长)。这和选项B是同一个意思。


    引起盐分渗入土壤的3个原因都在第四段里谈到了:第一是阻档海水的天然屏障红树林被砍伐(A);第二是在地中海地区严重的旱灾导致水平面下降,海水渗透(B); 第三是在拉丁美洲,水分被高温蒸发后留下了盐分(D)。


    affect这个动词的意思是“影响”,和influence是同义词,在这个上下文里可以替换用。


    四个选项的意思分另,1是:肯定的(positive)、否定的(negative)、有怀疑的(suspicious)、冷淡的(indifferent),从全文看作者时他们的研究无疑是肯定的。

  • 第20题:

    单选题
    With reference to a rotary vane steering gear system, which one of the following statements is true?()
    A

    The three moving vanes and the three fixed vanes form three pressure chambers

    B

    The three moving vanes and the three fixed vanes form six pressure chambers

    C

    The three moving vanes and the three fixed vanes form nine pressure chambers

    D

    The three moving vanes and the three fixed vanes form twelve pressure chambers


    正确答案: C
    解析: 暂无解析

  • 第21题:

    单选题
    Very few plants will()without water.
    A

    flourish

    B

    fade

    C

    stem

    D

    cultivate


    正确答案: D
    解析: 暂无解析

  • 第22题:

    单选题
    Fertilizer will()the growth of these tomato plants.
    A

    accomplish

    B

    accelerate

    C

    accumulate

    D

    account


    正确答案: B
    解析: 暂无解析

  • 第23题:

    单选题
    How should we understand the richness of these three civilizations according to the passage?
    A

    It meant people’s ability to produce commodities.

    B

    It meant people’s ability to domesticate plants and animals.

    C

    In population it meant the ability to raise a ruling class.

    D

    In population it meant the ability to draw other peoples to the area.


    正确答案: A
    解析:
    推断题由题干定位到文章第五段。该段第二句提到,富裕被理解为人们大量生产产品和提供服务的能力——不仅仅是农业,还包括如金属冶炼、陶艺和商业能力,由此可见,A、B两项的表述过于片面,可排除。该段倒数第二句提到,产品的盈余为地区提供财富,吸引人们来到这里,选项D是对此句的曲解,故排除。该段第三句提到,人口上的富裕意味着他们有盈余来为所控制的城市和地区供养统治管理阶层,或许一支军队。由此可知,选项C符合文意,故答案为C项。