首页
登录
职称英语
The term biological clock is applied to the means by which living things adj
The term biological clock is applied to the means by which living things adj
游客
2023-07-03
62
管理
问题
The term biological clock is applied to the means by which living things adjust their activity patterns, without any【B1】______ cue, to the time of day, or the month, or the year. The biological clocks seem to be beautifully【B2】______ the needs of living things. They are affected but little, if at all, by drugs, chemicals, or wide temperature difference —【B3】______ which may alter substantially the rates of all ordinary processes of the body.
The nature of the biological clocks’【B4】______ is still a mystery. Two quite different theories can【B5】______ them. According to the first of these theories, each individual contains its own independent timing system. This is believed to have【B6】______, aided by natural selection, as an adaptation to the rhythmic environment. It has now become independent of the environment. The other theory holds that living things react【B7】______ to their rhythmic physical environment. The setting of their biological clocks, therefore,【B8】______ a constant adjustment to subtle environment forces. But the search for the【B9】______ timing system has been futile thus far. Not only has no independent timing system ever been discovered, but there has not yet been even a guess【B10】______ its nature. [br] 【B6】
选项
答案
evolved
解析
此空需要动词的过去分词,与空格前的have构成完成时态作谓语。evolve“进化,发展”,其过去分词在词尾加-d。
转载请注明原文地址:https://tihaiku.com/zcyy/2804529.html
相关试题推荐
Differentthingsusuallystandfordifferentfeelings.Red,forexample,is
Differentthingsusuallystandfordifferentfeelings.Red,forexample,is
Differentthingsusuallystandfordifferentfeelings.Red,forexample,is
Differentthingsusuallystandfordifferentfeelings.Red,forexample,is
Intheearly20thcentury,fewthingsweremoreappealingthanthepromiseo
Intheearly20thcentury,fewthingsweremoreappealingthanthepromiseo
Intheearly20thcentury,fewthingsweremoreappealingthanthepromiseo
Lookingforanewweightlossplan?Trylivingontopofamountain.Mountai
Lookingforanewweightlossplan?Trylivingontopofamountain.Mountai
Lookingforanewweightlossplan?Trylivingontopofamountain.Mountai
随机试题
HowCanGirlsWininMathandScience?A)Mathisacumulat
Theconceptofpersonalchoiceinrelationtohealthbehaviorsisanimporta
[originaltext]Farmington,Utah,isamorepleasantcommunitysincealocal
标底是建设项目的预期价格,通常由投标单位制定。()
施工单位应当根据论证报告修改完善专项方案,并经()签字后,方可组织实施。A.施
单笔个人住房贷款贷前应重点检查()。A.借款人还款能力 B.首付款证明真实
下列关于可赎回债券的说法,错误的是()。A、约定的价格称为赎回价格,包括面值和
建设单位应当将大型的人员密集场所和其他特殊建筑工程的消防设计文件报送公安机关消防
具体运算阶段的儿童认知结构中已经具有了(),因而能进行逻辑推理。
最新回复
(
0
)