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__
A Special Clock Every living thing has what scientists call a biological clock that controls behavior. The biological clock__
admin
2009-06-15
53
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、shape
B、type
C、color
D、form
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/r5md777K
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"WhoFirstStartedtoSmoke?";youwilllistento
Lookatthequestionsforthispart.Youwillhearapassageabout"Migrationinthe19thCentury".Youwilllistentoitt
Lookatthequestionsforthispart.Youwillhearapassageabout"Migrationinthe19thCentury".Youwilllistentoitt
Lookatthequestionsforthispart.Youwillhearapassageabout"HealthandFitness".Youwilllistentoittwice.F
Youwillhearfivedifferentopinionsaboutfriendship.Forquestions9-13,choosefromthelistA-Fwhatfriendshipsmeant
OnhisTVprogramme,Stevelikestoshowaudiences
FRIENDSHIP0Ibelievethatnothingmattersasmuchashavingacoupleofreallygood00friends.Theyhelpyoufeell
WhichofthefollowingstatementsisNOTtrue,accordingtothepassage?Whoemptiesthebasket?
A.OuncesofwaterneededperdayB.ImportanceofwaterC.CompositionofwaterD.SignsofdehydrationE.SupplyofwaterF.Necessi
随机试题
下列哪项引起静脉回心血量减少
不与邻牙远中面接触的牙体是
化脓性感染形成脓肿后,外科治疗的基本原则是()
王某和张某到动物园游玩,老虎笼上挂着提示牌:“老虎凶猛,禁止逗弄”。王某和张某故意逗弄老虎,老虎非常生气,撞开笼门冲出笼子,王某撒腿就跑,张某吓得呆若木鸡,老虎将张某咬伤。经事后检查,老虎笼因为年代久远已经不甚牢固,动物园因为缺乏资金一直未更换新的老虎笼。
某工厂2014年第二季度发生下列经济业务:(1)4月销售一批商品给甲公司,价值10万元,商品已经发出,款项4月已经收到并存入银行。(2)4月预收乙公司20万元货款,5月发货,货物价值60万元,6月份,收回余款40万元。(3)4、5、6月对丙公司各月的
中国证监会工作人员依法履行职责,进行调查或者检查时,不得少于()人,并应当出示合法证件。
教师的职业从性质上看是()。
某学生在快速阅读英语课文时发现某段语句没有读懂,就放慢了阅读速度,重新仔细地进行阅读。该生使用的学习策略是()
针对说明中所描述的现象,分析A公司在项目管理方面存在的问题(200字以内)。针对A公司在该项目管理方面存在的问题,提出补救措施(300字以内)。
由值为29、12、15、6、23的五个叶子结点构造的哈夫曼树为(64),其带权路径长度为(65)。
最新回复
(
0
)