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
A Special Clock Every living thing has what scientists call a biological clock that controls behavior. The biological clock(5
A Special Clock Every living thing has what scientists call a biological clock that controls behavior. The biological clock(5
admin
2009-06-15
35
问题
A Special Clock
Every living thing has what scientists call a biological clock that controls behavior. The biological clock(51)plants when to form flowers and when the flowers should open. It tells insects when to(52) the protective cocoon (防护卵袋) and fly away, and it tells animals and human beings when to eat, sleep and wake.
Events outside the plant and animal(53)the actions of some biological clocks. Scientists recently found, for example, that a tiny animal changes the color of its fur because of the(54)of hours of daylight. In the short(55)of winter, its fur becomes white. The fur becomes gray brown in(56)in the longer hours of daylight in summer.
Inner signals control other(57)clocks. German scientists found that some kind of internal clock seems to order birds to begin their long migration(58)twice each year. Birds(59)from flying become restless when it is time for the trip,(60)they become calm again when the time of the flight has ended.
Scientists say they are beginning to learn which(61)of the brain contain biological clocks. An American researcher, Martin Moorhead, said a small group of cells near the front of the brain(62)to control the timing of some of our actions. These(63)tell a person when to wake, when to(64)and when to seek food. Scientists say there probably are other biological clock cells that(65)other body activities.
选项
A、says
B、asks
C、tells
D、talks
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/eymd777K
本试题收录于:
职称英语卫生类A级题库职称英语分类
0
职称英语卫生类A级
职称英语
相关试题推荐
Lookatthetenstatementsforthispart.Youwillhearapassageabout"CreditCardsHistory".Youwilllistentoittwice
Youwillhearfivepeoplegivingtheiropinionsonspankingchildren.Forquestions9-13,choosefromthelistA-Fwhateac
Youwillhearaconversationandrecordedmessage.Writedownonewordornumberineachofthenumberedspacesontheforms
MOUNTAINCLIMBINGOneofthemostdifficultbutrewardingofpastimesisthesportofmountainclimbing.Mountainclimbing
MOUNTAINCLIMBINGOneofthemostdifficultbutrewardingofpastimesisthesportofmountainclimbing.Mountainclimbing
ANUNUSUALSWIMMINGCLUBMembersofaspecialclubinBritaincheerfullyleavethewarmthCHEERoftheirbeds,
Accordingtothepassage,whichofthefollowingstatementsisNOTtruewhenapersonisinastateofdeeprelaxation?Asfar
PhotojournalistMargaretWhitebecamefamousforhercoverageofsignificanteventsduringtheSecondWorldWar.
FlorenceNightingalewasbornintoarich______.OnthebattlefieldsNightingaleandhernursesprovedtobe______.
AmericanDreamsThereisacommonresponsetoAmericaamongforeignwriters:theUSisalandofextremeswherethebestoft
随机试题
Thewaypeopleholdtothebeliefthatafun-filled,pain-freelifeequalshappinessactuallyreducestheirchancesofeveratta
千峰山是一处游览胜地,每日有大量游客。几年前不注意保护环境,现在已大有改观。请根据以下内容写一篇报道。注意:1)字数100左右;2)开头已为你写好;3)参考词汇:保护—protectionn./protectv.环境—environment
疮疡的半阴半阳证,外用药物宜选用()
适用于建筑的天窗、采光屋顶、阳台及须有防盗、防抢功能要求的营业柜台的遮挡部位的安全玻璃是()。
消费者或者其他受害人因商品缺陷造成人身、财产损害的,可以()。
全面推进依法治国,必须坚持()有机统一,这是我国社会主义法治建设的一条基本经验。
素质教育就是多开展课外活动、多上文体课。
世界上已知的矿产在中国均能找到,且储量丰富。目前,已经探明储量的矿产有156种,总储量居世界第()位。
下面关于VB应用程序的叙述中正确的是
A、Mindyourhead.B、Yes,Iam.C、Sure.D、Nohurry.C本题考查向别人提出请求的一般疑问句及回答。回答分为肯定和否定两种情况:肯定回答一般有Sure/Certainly/Yes,ofcourse/Nopr
最新回复
(
0
)