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
42
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
A、Bydiggingsite.B、Byreconstructingskeletons.C、Byobservingthemclosely.D、Bylivingwiththem.B文章中提到通过重组骨架,科学家能获知恐龙的生活条件
A、Thatdrugsshouldnotbeusedwithoutdoctorsadvice.B、Thatdrugsandsubstancesaredifferent.C、Thatsubstancesshouldbeu
A、Differentculturesandcustoms.B、Thewoman’sfirstyearatuniversity.C、Thingsthatthewomanisdoingnow.D、Theforeignro
Societieschangeovertimewhiletheirreputations【C1】______behind.Manythingswhichareoftenregardedas【C2】______Britishder
Societieschangeovertimewhiletheirreputations【C1】______behind.Manythingswhichareoftenregardedas【C2】______Britishder
Societieschangeovertimewhiletheirreputations【C1】______behind.Manythingswhichareoftenregardedas【C2】______Britishder
Societieschangeovertimewhiletheirreputations【C1】______behind.Manythingswhichareoftenregardedas【C2】______Britishder
Societieschangeovertimewhiletheirreputations【C1】______behind.Manythingswhichareoftenregardedas【C2】______Britishder
随机试题
When27yearsofage,Burnsfirstattractedliteraryattention,andinthesamemomentsprangtothefirstplaceinScottishlet
下列属于激素替代治疗的是
非上市债券作为一种投资工具和股票投资相比,具有()的特点。
儿童能以命题形式思维,则其认知发展已达到()。
下列关联词使用恰当的一项是()。
设f(x)=sint2dt,g(x)=x3+x4,则当x→0时,f(x)是g(x)的().
在窗体中有一个名称为run35的命令按钮,单击该按钮从键盘接收学生成绩,如果输入的成绩不在0到100分之间,则要求重新输入;如果输入的成绩正确,则进入后续程序处理。rtm35命令按钮的Click的事件代码如下:PrivateSubrun35_
Howfitareyourteeth?Areyoulazyaboutbrushingthem?Neverfear:Aninventorisonthecase.Anelectrictoothbrushsenses
Workingatypewriterbytouch,likeridingabicycleorstrollingonapath,isbestdonebynotgivingitaglancingthought.O
Ascientistwhowantstopredictthewayinwhichconsumerswillspendtheirmoneymuststudyconsumerbehavior.Hemustobtain
最新回复
(
0
)