首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
It has been known since ancient times that certain plants regularly open their leaves in daytime and close them at night. It was
It has been known since ancient times that certain plants regularly open their leaves in daytime and close them at night. It was
admin
2010-02-26
60
问题
It has been known since ancient times that certain plants regularly open
their leaves in daytime and close them at night. It was assumed which this 【S1】______.
periodic change was triggered by the alternating sunlight and darkness. Such
leaves stick to their daily routine even when keeping in constant darkness. 【S2】______.
What is circadian rhythm? Many biological processes follow a 24-hours 【S3】______.
schedule. These cycles are called circadian rhythms. These innate rhythms are
governed by sophisticated chemical mechanisms can be described as biological 【S4】______.
clocks. Such rhythms are important for humans too! We sleep through most
of the hours of darkness and are awaken through most of the hours of 【S5】______.
daylight. Body temperature increases during the day and decreases during the
night. The secretion of various hormones that controls life’s processes rises 【S6】______.
and falls to a circadian rhythm.
How does this relate to health? Circadian rhythms are important for
desirable functioning of the processes vital to health. This is most effectively
illustrated and the normal circadian rhythms are disrupted by lack of sleep or by 【S7】______.
crossing time zones. It may take days or even hours for all the bodies circadian 【S8】______.
rhythms to read just appropriately. The turmoil (混乱) that results from the
readjustment process when time zones are crossed experienced as the 【S9】______.
phenomenon of jet lag. This is also experienced by people who do shift work
Understanding circadian rhythms may be irrelevant to the understanding and 【S10】______.
treatment of disease. Therapy can be more effective and toxic effects reduced
when drugs are administered at carefully selected times of the day.
【S2】
选项
答案
keeping→kept
解析
根据上下文,本句的意思“(白天)即便把这些叶子一直放置在黑暗处,它们依然遵循白天的规律”。状语keep和主语leaves 之间是被动关系,因此应该用过去分词形式,而不是现在分词形式。
转载请注明原文地址:https://kaotiyun.com/show/IOdK777K
0
大学英语六级
相关试题推荐
Accordingtothepassage,properarrangementofphysicalenvironmentinacompany______.Itcanbeinferredthattheauthor__
A、Water.B、Crops.C、Money.D、Trees.BWhichofthefollowingisthemainsourceofconflictbetweentheelephantsandthelocalp
It’ssaidthatGov.JonCorzinesufferedfromaseverinjuryprobablybecause______.NHTSAhassetinstructionsparticularlyf
Bluetoothischangingsmall-areanetworkingintoawirelessandautomaticconnectionwithnoneedforuserinterventionandlow
A、Heusuallydoesn’treturnhome.B、Heisshortofmoney.C、Thehouseherentsistoolarge.D、Heisverylonely.BWhydoesthe
A、Frenchrefugeesarrived.B、Theharborwasdestroyed.C、Shipbuildingbegantoflourish.D、ThecitywastakenbytheEnglish.CW
A、American.B、European.C、Indian.D、Tribal.CWhoselanguageshavegivenmanywordstoEnglish?
Asawisemanoncesaid,weareallultimatelyalone.ButanincreasingnumberofEuropeansarechoosingtobesoataneverear
A、Thediscussion.B、TheEuropeanUnionteam.C、TheEuropeanUniondeputyforeignministers.D、TheUNinvestigation.DWhatdidth
A、Thenextday.B、OnSaturday.C、Inthreedays.D、Inoneweek,BWhenishersister’sbirthday?信息明示题。女士询问包裹能否在自己妹妹过生日那天,也就是周六寄到,
随机试题
下列哪项不是地黄饮子所治瘖痱证的临床表现
肝脏是合成下列哪种物质的特异性器官
普鲁卡因过敏延迟反应常见的是
关于司法鉴定,下列哪些选项是正确的?
某施工单位拒不履行法院生效判决,现查明该单位在银行账户存有一笔款项,则法院可采取的强制执行措施是()。
2015年5月11日,中国人民银行对金融机构存贷款利率浮动区间进行了调整,调整为基准利率的()。
我国于1979年颁布的刑法规定了社区矫正的()。
《国家中长期教育改革和发展规划纲要(2010一2020年)》的灵魂是()。
设x=x(t)由sint-∫1x-te-u2du=0确定,求.
Itsoundslikeasciencefiction,butresearcherssayit’sascientificfact:Microscopicorganismsdubbed"killeralgae"arepa
最新回复
(
0
)