题目内容
3.Are you sick of going to bed late and waking up tired?(36)F A new study suggests that a couple days of camping in the great outdoors can reset your circadian clock and help you get more sleep.The circadian clock,more commonly known as the body clock,is an internal system that tells our bodies when it's time to go to sleep and when it's time to wake up.(37)C
In a healthy sleeper,melatonin levels rise a few hours before bedtime,stay high through the night,and then settle back down when it's time to wake up.
In our modern society,however,most of us stay up many hours past sunset and would probably sleep in many hours after sunrise if we could.(38)G It may also have other health consequences as well,such as diabetes,overweight and heart disease.
Professor Kenneth Wright of the University of Colorado in the US wanted to see if our body clocks can be reset by a short stay in nature.(39)E Nine went on a weekend camping trip,while the other five stayed home.
At the end of the weekend,the researchers reported that in just two days,the campers'body clocks had shifted so that their melatonin levels began to rise more than an hour earlier than they did before they left on the trip.(40)B
A.He prepared a lot for the research,and asked many friends to help him.
B.By contrast,the body clocks of the group that stayed home shifted even later over the course of the weekend.
C.Scientists track this clock by measuring the amount of melatonin (褪黑激素) circulating in a person's blood at any given time.
D.Now you have a good solution.
E.His team recruited 14physically active volunteers in their 20s and 30s.
F.Then grab your hiking boots and a tent.
G.And the trouble is,your melatonin levels may still be high when your alarm clock goes off in the morning,which leads to grogginess.
分析 本文主要介绍人体生物钟对人体的影响.人体的生物钟是可以调整的,但是,生物钟如遭到破坏,可能影响人的健康,如患糖尿病,身体肥胖,心脏病等.
解答 36--40 FCGEB
36.F 考查上下文理解判断能力.前一句为提出问题,那么该空应该给出解决方法.根据上下文A new study suggests that a couple days of camping in the great outdoors can reset your circadian clock and help you get more sleep可知,一项新的研究显示几天的户外野营能重置你的生物钟,帮你得到更多的睡眠.下文应是:grab your hiking boots and a tent(抓住你的登山鞋和帐篷).故选F.
37.C 考查上下文理解判断能力.由37题的位置可知,其作用为承上启下.37前面讲的是the circadian clock的作用,下一段则提出了melatonin levels这一新话题.那么37选项中必定包含这两个关键信息,即Scientists track this clock by measuring the amount of melatonin circulating in a person's blood at any given time(科学家通过在一定的时间里测量在人体血液中循环的褪黑激素来追踪这种生物钟),故选C.
38.G 考查上下文理解判断能力.根据后一句的代词"It"可知,前一句的主语为物.同时,后面提到了it may also have other health consequences as well,可以推断38题里面必然提到相关的健康问题,即And the trouble is,your melatonin levels may still be high when your alarm clock goes off in the morning,which leads to grogginess(麻烦是,当你的生物钟在早上响起时你的褪黑激素水平仍然很高,这将导致头晕).故选G.
39.E 考查上下文理解判断能力.根据下文Nine went on a weekend camping trip,while the other five stayed home可知,九人周末去野营,其他五人留在家里.上文应是:His team recruited 14 physically active volunteers in their 20s and 30s(他的团队招聘了14名20岁到30岁身体活跃的志愿者).故选E.
40.B 考查上下文理解判断能力.本段介绍了研究的结果,七个选项中只有B符合.该题前一句的the campers'body clocks had shifted正好对应B选项中的the body clocks of the group…shifted….故选B.
点评 七选五题型看似简单,实际上有时完全作对并不容易,需要方法和分析能力及足够的耐力,有必要进行专门练习.首先,快速浏览一遍七个备选答案,先确定哪个选项适合放在文章的什么位置.其次,快速浏览文章,确定文章体裁,抓住文章结构,分析篇章结构,找出各段的主题句或主旨大意.其三,注意各选项中出现的句子衔接手段,寻找句中衔接标志词,七选五备选答案中有两个多余的选项,会对文章中两个空的选择构成干扰,这时要特别细致地比对相似选项.最后,用代入法,检查答案是否合理,将所有选择答案放回空白处,通读全文,检查文章内容是否语义连贯合理、紧扣主题,语篇结构是否通顺连贯、具有一致性、合乎逻辑,写作思路是否清晰明了,格式以及用语是否恰当贴切,从而判断选择的答案是否正确.
A. | commands | B. | demands | C. | recommends | D. | reminds |
A. | contribution | B. | distribution | C. | location | D. | separation |