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
37
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】______
【B7】
选项
答案
mystery
解析
转载请注明原文地址:https://kaotiyun.com/show/EH07777K
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、Underapieceofstone.B、Underthewindow.C、Inthekitchen.D、Neartheliving-room.AWhendidthespeakerputhiskey?
Duringrecentyears,wehaveheardmuchabout"race":howthisracedoescertainthingsandthatracebelievescertainthingsan
A、Thatdrugsshouldnotbeusedwithoutdoctorsadvice.B、Thatdrugsandsubstancesaredifferent.C、Thatsubstancesshouldbeu
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
下列关于Test类的定义中,正确的是()。
中质原油相对密度在0.5~1.0范围内。
注意力缺陷多动症中枢性脑瘫
男,8个月,腹泻3天,入院诊断脱水酸中毒、营养不良,经补液纠正脱水酸中毒于入院后12小时出现嗜睡、呼吸变浅、心音低钝、心率加快、腹胀、肠鸣音弱,血钠135mmol/L。该患儿可能的诊断是
高速旋转阳极X线管,阳极启动电源的频率是
“槟榔肝”的发生是由于()
计算机硬件五大基本构件包括:运算器、存储器、输入设备、输出设备和()。
下列关于诉讼时效中止的表述,正确的有()。
“确立学生的行为标准”属于课堂教学管理方法中的()。
关系数据库语言SQL基本有两种使用方式,在一种使用方式下,它是面向集合的描述型语言,它是非过程性的,大多数语句都可以独立执行,与上下文无关。这种使用方式称之为()。
最新回复
(
0
)