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
55
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、flight
B、operation
C、movement
D、transportation
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/Ji1d777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
Readthefollowingtextanddecidewhichanswerbestfitseachspace.Forquestions26~45,markoneletterA,B,CorDony
Readthefollowingarticleandanswerquestions19-25.Forquestions19-25,choosethecorrectanswerA,B,CorD.Mark
Readthefollowingpassageandanswerquestions9-18.1.Mostyoungpeopleenjoysomeformsofphysicalactivity.Itmaybewalk
Readthefollowingpassageandanswerquestions9-18.1.Ifsustainablecompetitiveadvantagedependsonwork-forceskills,Amer
Whatdoyouthinkofwhenyouhearthewordmotherhood?Ifyouarelikemostpeople,youassociatemotherhoodwithanumberofp
Sportingactivitiesareessentiallymodifiedformsofhuntingbehavior.Viewedbiologically,themodernfootballerisrevealeda
Computerpeopletalkalotabouttheneedforotherpeopletobecome"computer-literate",inotherwords,tolearntounderstand
1.FilmisamediumthatmighthavebeenespeciallymadeforAmerica,avastcountrywhich,bythebeginningofthetwentiethce
1.FilmisamediumthatmighthavebeenespeciallymadeforAmerica,avastcountrywhich,bythebeginningofthetwentiethce
Formuchofthepastdecade,AmericanandBritishscientistshavebeenannoyedbythephenomenonknownastheFrenchParadox.Nu
随机试题
4只小猴吃桃,第1只猴吃的是其他猴吃的1/3,第2只猴吃的是其他猴吃的1/4,第3只猴吃的是其他猴吃的1/5,第4只猴将剩下的46个桃全吃了,则4只猴子共吃了()桃。
某日13时10分,罗某驾驶一辆中型客车从高速公路0公里处出发,下午14时10分行至该高速公路125公里加200米处时,发生追尾碰撞,机动车驶出西南侧路外边坡,造成11人死亡、2人受伤。罗某的主要违法行为是什么?
以滋阴养血、补心安神为主要功效,最宜选用的方剂是
女婴,出生6天,其母换尿片时发现其阴道流出少量血性分泌物而向护士咨询。护士正确的解释是
装修公司甲在完成一项工程后,将剩余的木地板、厨卫用具等卖给了物业管理公司乙。但甲营业执照上的核准经营范围并无销售木地板、厨卫用具等业务。甲、乙的买卖行为法律效力如何?
根据《德国民法典》规定,下列说法中正确的是()。
根据《旅行社条例》规定,旅行社委派的导游人员和领队人员未持有国家规定的导游证或者领队证的,由旅游行政管理部门责令改正,对旅行社处()的罚:款。
下列关于壮族的描述,正确的有()。
辨认
WhatmakesAmericansspendnearlyhalftheirfooddollarsonmealsawayfromhome?TheanswerslieinthewayAmericanslivetod
最新回复
(
0
)