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
The term biological clock is【B1】_____to the means by which living things【B2】_____their activity patterns, without any【B3】_____cu
The term biological clock is【B1】_____to the means by which living things【B2】_____their activity patterns, without any【B3】_____cu
admin
2013-07-10
49
问题
The term biological clock is【B1】_____to the means by which living things【B2】_____their activity patterns, without any【B3】_____cue, to the time of day, or the month, or the year. The biological clocks seem to be beautifully【B4】_____to the needs of living things. They are【B5】_____ but little, if at all, by drugs, chemicals, or wide temperature difference—factors which may alter substantially the rates of all ordinary【B6】_____ of the body.
The nature of the biological clocks’ mechanism is still a【B7】_____. Two quite different theories can【B8】_____ for them. According to the first of these theories, 【B9】______. This is believed to have evolved, aided by natural selection, as an adaptation to the rhythmic environment. It has now become independent of the environment. 【B10】______. The setting of their biological clocks, therefore, involves a constant adjustment to subtle environment forces. But the search for the specific timing system has been futile thus far. 【B11】______
【B11】
选项
答案
Not only has no independent timing system ever been discovered, but there has not yet been even a guess as to its nature
解析
转载请注明原文地址:https://jikaoti.com/ti/FxoFFFFM
0
大学英语四级
相关试题推荐
Withoutthefrictionbetweentheirfeetandtheground,peoplewould___________(决不能行走).
A、Underapieceofstone.B、Underthewindow.C、Inthekitchen.D、Neartheliving-room.AWhendidthespeakerputhiskey?
A、Memoriesofarecentstorm.B、Howstrongwindsdevelopintoahurricane.C、WeatherpatternsthatcanaffectFlorida.D、Plannin
Duringrecentyears,wehaveheardmuchabout"race":howthisracedoescertainthingsandthatracebelievescertainthingsan
Societieschangeovertimewhiletheirreputations【C1】______behind.Manythingswhichareoftenregardedas【C2】______Britishder
Societieschangeovertimewhiletheirreputations【C1】______behind.Manythingswhichareoftenregardedas【C2】______Britishder
Societieschangeovertimewhiletheirreputations【C1】______behind.Manythingswhichareoftenregardedas【C2】______Britishder
随机试题
行政诉讼的原告是公民、法人或其他组织,被告是实施具体行政行为的行政机关公务员。()
影响当代世界发展的主要障碍是【】
关于消化性溃疡,下列哪些说法不正确
病人表现为一侧视乳头萎缩,对侧视乳头水肿,以下定位诊断中可能性最大的是
A、a.mB、i.dC、imD、Mist.E、OTC每日2次()
甲、乙和丙于2012年3月签订了散伙协议,约定登记在丙名下的合伙房屋归甲、乙共有。后丙未履行协议。同年8月,法院判决丙办理该房屋过户手续,丙仍未办理。9月,丙死亡,丁为其唯一继承人。12月,丁将房屋赠给女友戊。并对赠与合同作了公证。下列哪一表述是正确的?(
按照现行规定,股份转让公司一经在代办股份转让系统挂牌进行股份转让,其所有股份均可进行转让。()
张某依法投资设立了一家一人有限责任公司。在公司存续期间,张某实施的下列行为中,不符合公司法律制度规定的是()。
请分析项目中出现这些情况的可能原因(200字以内)。请说明李某作为项目经理要承担哪些角色?要成为一名合格的项目经理要具备哪些知识与技能?(300字以内)
Anorganization’sreputation,profitability,andevenitscontinuedexistencecandependonthedegreetowhichitstargetedpub
最新回复
(
0
)