首页
登录
职称英语
It has been known since ancient times that certain plants regularly openthe
It has been known since ancient times that certain plants regularly openthe
游客
2024-06-11
37
管理
问题
It has been known since ancient times that certain plants regularly open
their leaves in daytime and close them at night. It was assumed which this 【S1】______.
periodic change was triggered by the alternating sunlight and darkness. Such
leaves stick to their daily routine even when keeping in constant darkness. 【S2】______.
What is circadian rhythm? Many biological processes follow a 24-hours 【S3】______.
schedule. These cycles are called circadian rhythms. These innate rhythms are
governed by sophisticated chemical mechanisms can be described as biological 【S4】______.
clocks. Such rhythms are important for humans too! We sleep through most
of the hours of darkness and are awaken through most of the hours of 【S5】______.
daylight. Body temperature increases during the day and decreases during the
night. The secretion of various hormones that controls life’s processes rises 【S6】______.
and falls to a circadian rhythm.
How does this relate to health? Circadian rhythms are important for
desirable functioning of the processes vital to health. This is most effectively
illustrated and the normal circadian rhythms are disrupted by lack of sleep or by 【S7】______.
crossing time zones. It may take days or even hours for all the bodies circadian 【S8】______.
rhythms to read just appropriately. The turmoil (混乱) that results from the
readjustment process when time zones are crossed experienced as the 【S9】______.
phenomenon of jet lag. This is also experienced by people who do shift work
Understanding circadian rhythms may be irrelevant to the understanding and 【S10】______.
treatment of disease. Therapy can be more effective and toxic effects reduced
when drugs are administered at carefully selected times of the day. [br] 【S1】
选项
答案
which→that
解析
从语法结构看,句中的it 是形式主语,真正的主语是assumed 后边的主语从句。而该主语从句中不缺任何成分,所以应该用that 引导。
转载请注明原文地址:https://tihaiku.com/zcyy/3628686.html
相关试题推荐
Inadditiontoexercisingregularly,eatingagoodbreakfastisconsidered
Inadditiontoexercisingregularly,eatingagoodbreakfastisconsidered
Inadditiontoexercisingregularly,eatingagoodbreakfastisconsidered
Inadditiontoexercisingregularly,eatingagoodbreakfastisconsidered
Ithasbeenknownsinceancienttimesthatcertainplantsregularlyopenthe
Ithasbeenknownsinceancienttimesthatcertainplantsregularlyopenthe
Ithasbeenknownsinceancienttimesthatcertainplantsregularlyopenthe
Ithasbeenknownsinceancienttimesthatcertainplantsregularlyopenthe
Ithasbeenknownsinceancienttimesthatcertainplantsregularlyopenthe
Ithasbeenknownsinceancienttimesthatcertainplantsregularlyopenthe
随机试题
Howcloseparentsaretotheirchildren______astronginfluenceonthecharacter
______,heisreadytoacceptsuggestionsfromdifferentsources.A、Insteadofhi
TheAmazonMystery:WhatAmerica’sStrangestTechCompanyIsReal
[originaltext]QuestionNo.1MyfatherhasalwayssupportedwhatI’mgoingtod
有关学生勤工助学活动管理工作,以下表述正确的有()A.学生在学有余力的前提下,
Thechangeinthatvillagewasmiraculou
66)在最大运行方式下,电流保护的保护区大于最小运行方式下的保护区。()
郑州商品交易所是我国第一家成立的期货交易所。上市的期货品种体系覆盖农业、能源、化
对于机物料消耗、低值易耗品的领用等费用,成本中心应如何进行分配()。A.直
根据支付结算法律制度的规定,下列关于银行结算账户撤销的表述中,不正确的是()。
最新回复
(
0
)