参考答案和解析
正确答案:当人从亮处突然进入暗室,最初几乎看不清任何物体,经过一定时间后,逐渐恢复了在暗处的视力,这种现象叫暗适应。
更多“暗适应(dark adaptation)”相关问题
  • 第1题:

    共用题干
    Dark Forces Dominate Universe

    The earth,moon,sun and all visible stars in the sky make up less than one percent of
    the universe.Almost all the rest is dark matter and dark energy,unknown forces that
    _______(1)astronomers.
    Observations in recent years have changed the basic_______(2)of how the
    universe evolved and have indicated how little is known about the major forces and
    substances that_______(3)our world.
    Astronomers now know that luminous(发光的)matter一stars , planets and hot gas一
    accounts_______(4)only about 0.4 percent of the universe.Non-luminous
    components , such as black holes and intergalactic(星系间的)gas,_______(5)
    up 3.6 percent.The rest is either dark matter,about 23 percent,or dark energy,about
    73 percent.
    Dark matter,sometimes_______(6)"cold dark matter,"has been known for some time.Only recently have researchers come to understand the key role it_______ (7)in the formation of stars,planets and even people.
    "We_______(8)our very existence to dark matter,"said physicist Paul
    Steinhardt and a co-author of a review on dark matter which_______(9)not long ago
    in the journal Science.
    "Dark matter dominated the structure_______(10)in the early universe,"
    Steinhardt said."For the first few billion years dark matter contained most of the mass of the
    universe. You can think of ordinary matter_______(11)a froth(泡沫)of an ocean
    of dark matter. The dark matter clumps(结成块)and the ordinary matter falls into it. That
    _______(12) to the formation of the stars and galaxies(星系)."
    Without dark matter,"there would be virtually no structures in the universe,"
    The nature of dark matter is_______(13).It cannot be seen or detected
    directly. Astronomers know it is there because of its_______(14) on celestial(天体
    的)objects that can be seen and measured.
    But the most dominating force of all in the universe is called dark energy,a recently
    ________(15)power that astronomers say is causing the galaxies in the universe to
    separate at a faster and faster speed.

    _________(11)
    A:with
    B:as
    C:from
    D:beside

    答案:B
    解析:

  • 第2题:

    ETCA分别代表()

    • A、experience
    • B、test
    • C、concept
    • D、adaptation

    正确答案:A,B,C,D

  • 第3题:

    暗反应(dark reactions)


    正确答案:利用光反应生成的ATP和NADPH的化学能使CO2还原成糖或其它有机物的一系列酶促过程。

  • 第4题:

    以下哪项是EGPRS的关键技术?()

    • A、Incremental Redundancy
    • B、Packet Control Unit
    • C、Dynamic Abis Pool
    • D、Link Adaptation

    正确答案:A,C,D

  • 第5题:

    名词解释题
    暗适应(dark adaptation)

    正确答案: 当人从亮处突然进入暗室,最初几乎看不清任何物体,经过一定时间后,逐渐恢复了在暗处的视力,这种现象叫暗适应。
    解析: 暂无解析

  • 第6题:

    填空题
    According to the passage, to slow the process of adaptation is the solution to “hedonic treadmill”.____

    正确答案: F
    解析:
    由题干中关键词“hedonic treadmill”定位至F段。本段提出“享乐适应症(hedonic treadmill)”这一现象时,说我们能够减缓这个适应过程,故匹配段落为F段。

  • 第7题:

    填空题
    We can see the importance of adaptation when bad times strike.____

    正确答案: H
    解析:
    由题干中“the importance of adaptation”定位至H段。本段讲到当好事接二连三出现时,适应调整可能是我们所不情愿的;但当厄运降临(when bad times strike),适应调整却能把我们从痛苦中解救出来,故匹配段落为H段。

  • 第8题:

    名词解释题
    明适应(light adaptation)

    正确答案: 人从暗处来到强光下,最初感到强光耀眼,不能视物,只有稍待片刻,才能恢复视觉,这种现象叫明适应。
    解析: 暂无解析

  • 第9题:

    单选题
    You work as a Web Developer at Certkiller.com. You are in the process of creating a Webapplication using Microsoft ASP.NET 3.5.  You create a folder named Dark in the App_Themes folder of the Web application. You also addfour skin files to this folder. You have to make sure that the controls on a page have their appearances overridden by the control definitions defined in the skin files. What should you do?  Which Page directive should you use?()
    A

    You should use the page directive: <%@ Page StyleSheetTheme=App_Themes.Dark/>

    B

    You should use the page directive: <%@ Page Theme=App_Themes.Dark/>

    C

    You should use the page directive: <%@ Page Theme=Dark/>

    D

    You should use the page directive: <%@ Page StyleSheetTheme=Dark/>


    正确答案: D
    解析: 暂无解析

  • 第10题:

    单选题
    Hardly did he hear his mother's calling when he realized that it was already dark.
    A

    did he hear

    B

    calling

    C

    when

    D

    it was already dark


    正确答案: B
    解析:

  • 第11题:

    名词解释题
    全身适应综合征衰竭期(The exhaustion stage of general adaptation syndrome)

    正确答案: 持续强烈的有害刺激耗竭机体抵抗能力,肾上腺皮质激素持续升高,但糖皮质激素受体的数量和亲和力下降,机体内环境明显失衡,应激相关疾病及器官功能衰竭出现
    解析: 暂无解析

  • 第12题:

    单选题
    They had the appearance of dark-skinned and dark-haired humans, _____ of course they were much smaller than ordinary people.
    A

    however

    B

    although

    C

    while

    D

    nevertheless


    正确答案: D
    解析:
    句意:他们有人类的外表—黝黑的皮肤,黑亮的头发,尽管比普通人小得多。although引导让步状语从句。

  • 第13题:

    __________

    A.popular
    B.large
    C.remarkable
    D.dark

    答案:A
    解析:

  • 第14题:

    适应(adaptation)


    正确答案:①细胞、组织或器官;②耐受刺激作用;③存活的过程;④形态:萎缩、肥大、增生、化生。

  • 第15题:

    明适应(light adaptation)


    正确答案:人从暗处来到强光下,最初感到强光耀眼,不能视物,只有稍待片刻,才能恢复视觉,这种现象叫明适应。

  • 第16题:

    请解释适应(adaptation)、适合度(fitness)的含义并说明适合度的两个重要内涵是什么?


    正确答案: 种群中存活和生殖最有效的个体(即具有最高适合度的)将比适合度低的个体,贡献更多的后裔给以后的世代。说得通俗点就是某一基因型相对于其他的基因型相比,能够存活并留下后代的相对能力。

  • 第17题:

    单选题
    They had the appearance of dark-skinned and dark-haired humans, _______ of course they were much smaller than ordinary people.
    A

    however

    B

    although    

    C

    while  

    D

    nevertheless


    正确答案: A
    解析:
    他们有人类的外表—黝黑的皮肤,黑亮的头发,尽管比普通人小得多。although引导让步状语从句。

  • 第18题:

    单选题
    I don't feel like going out now: I'm not used to have a walk after dark.
    A

    don't

    B

    going out

    C

    to have a walk

    D

    after dark


    正确答案: B
    解析:

  • 第19题:

    名词解释题
    全身适应综合征的抵抗期(The resistance stage of general adaptation syndrome)

    正确答案: 应激原持续作用于机体,在警告反应后,表现出以肾上腺皮质激素分泌增多为主的适应性反应,称抵抗期
    解析: 暂无解析

  • 第20题:

    名词解释题
    适应(adaptation)

    正确答案: 细胞和由其构成的组织、器官能耐受内、外环境中各种有害因子的刺激作用而得以存活的过程,称为适应。适应在形态上表现为萎缩、肥大、增生、化生。
    解析: 暂无解析

  • 第21题:

    问答题
    何谓 Dark field?

    正确答案: 接收散射光讯号的缺陷扫描机
    解析: 暂无解析

  • 第22题:

    单选题
    _____ he realized it was too late to return home.
    A

    No sooner it grew dark when

    B

    It was not until dark that

    C

    Scarcely it grew dark than

    D

    While it grew dark that


    正确答案: D
    解析:

  • 第23题:

    单选题
    5~8分钟时暗适应曲线上的转折点代表了()
    A

    视锥细胞暗适应过程的开始

    B

    视锥细胞暗适应过程的终止

    C

    视杆细胞暗适应过程的开始

    D

    视杆细胞暗适应过程的终止

    E

    视锥细胞光敏色素的更换


    正确答案: E
    解析: 暂无解析