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閱讀下面短文，從短文后的選項中選出可以填入空白處的最佳選項。選項中有兩項為多余選項。
   Some people say house dust is mostly human skin cells，but it's only a little bit true. （1）
A
A
，but there are many other components on top of your ceiling fans.These include paint，hair，building materials，bacteria，viruses，insect body parts，etc.
   That list is based on the Canadian House Dust Study，in which researchers collected dust samples from 1，025 Canadian homes.The proportions of the components vary from household to household.A house near a busy road，for example，is likely to harbor a high level of outdoor pollutants from car exhaust.（2）
D
D
.
   The commonly-cited statement that 70% to 80% of house dust is human skin cells is likely not true for most houses. （3）
G
G
，and 40% came from dirt and other materials from outside.That indoor 60% included everything from organic fibers to building materials，not just dead skin cells.
   People do drop lots of skin cells as they go about their business. （4）
E
E
.Not all dead skin flakes （剝落） off onto your home's floors.Many run down the drain （下水道） in the shower，and others are contained by clothing and end up being washed out in the washing machine.
   （5）
F
F
.One study found that higher levels of cholesterol and squalene （oils found in dead skin） in dust were associated with lower levels of ozone （臭氧） indoors.Ozone is a pollutant that can cause lung discomfort.Ozone reacts with these oils，thus reducing indoor ozone by between 2% and 15%.

A.Skin cells are part of the makeup of house dust
B.But our body is made up of far more cells than that
C.The skin helps people maintain the right internal temperature
D.A newly-built house might have much dust from construction
E.The average adult loses about 500 million skin cells each day
F.It may not be a bad thing to have some dead skin in your home
G.According to a study of house dust，60% of the components of the dust came from indoors

【考點】說明文；科普知識．

【答案】A；D；G；E；F

【解答】

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發(fā)布：2024/5/27 14:0:0組卷：3引用：1難度：0.5

相似題

1．    Reading is a complex and crucial skill that impacts the youth's ability to perform as students.Therefore，it's important to develop reading skills during childhood.A team of researchers focused on the effect of whole-body learning in instruction，known as embodied learning.
    The research included 149 children，aged 5 to 6，who had just started school.They were divided into three groups：one that stood up and used their whole bodies to shape letter sounds；a seated group that shaped letter sounds with their hands and arms；and a control group that received traditional，seated instruction during which they wrote letters by hand.
    "Our research showed that children who used their whole bodies to shape the sounds of letters became twice as proficient at letter sounds that are more difficult to learn as those who received traditional instruction" says PhD student Linn Damsgaard of UCPH's Department of Nutrition，Exercise and Sports.
    With regard to difficult letter sounds，she adds， "There are many difficult letter sounds in Danish.These sounds are particularly important because once children become skilled at them，they will be better readers.
    Associate professor Jacob Wienecke，who led the study，explains，the primary goal is to learn more about which methods can be used to give beginner readers a good start.The idea is that if，through play and movement，we can learn where their strengths truly lie，we'll create a form of learning that combines reading with play，and that's truly positive."
    Previously，the researchers showed that the children felt more motivated by teaching methods which included physical movement.Jacob Wienecke hopes this will provide an opportunity to inspire teachers and school managers to prioritize movement across subjects.
    The study also investigated whether a direct effect of embodied learning could be found on children's reading of words.This was not possible，which might be due to the fact that the children were at such an early stage of their literacy development that they could not yet use their knowledge of letter sounds to read words.

（1）What were the participants required to do in the study？

A．To pick out difficult letter sounds in Danish.
B．To learn new letters through repeated writing.
C．To learn letter sounds using different approaches.
D．To memorize some letter sounds as soon as possible.
（2）How can embodied learning get children actively involved？

A．By combining learning with games.
B．By offering them chances to cooperate.
C．By inspiring them to overcome difficulties.
D．By explaining instructions to them patiently.
（3）What does the underlined word "proficient" in Paragraph 3 probably mean？

A．terrible.
B．skilled.
C．delighted.
D．fascinated.
（4）What does Jacob expect of the research finding？

A．Encouraging educators to apply it to teaching.
B．Enabling researchers to carry out further studies.
C．Urging schools to pay attention to physical exercise.
D．Promoting harmonious teacher-student relationships.
（5）What does the last paragraph intend to tell us？

A．Children prefer learning step by step.
B．Children are too little to use their knowledge smartly.
C．Children lack enough practice to get fully improved.
D．Children's learning still relies on adults' instruction.
發(fā)布：2024/10/26 13:0:2組卷：15引用：1難度：0.5
解析

2．How to Work Out Your Worries by Writing
Something troubling you？You should write about it!Research indicates that people who write about a difficult situation often show improved mental and physical health.
   （1）

.It is a specific technique，and it's different from writing in a journal.The idea is to reflect honestly and thoughtfully on a particular challenge.
   Hundreds of studies over several decades have looked at the potential benefits of expressive writing.It can strengthen the immune system，including for people with illnesses such as flu，cancer and depression. （2）

   Expressive writing works because it allows you to make meaning out of a painful experience，experts say. （3）

Then translating that experience into language forces you to organize your thoughts.And creating a narrative gives you a sense of control.
   But expressive writing isn't a magical cure-all solution. （4）

.And people coping with a severe injury or depression may not find it useful to do on their own，without therapy （治療）.
   （5）

？Thinking or talking about an event can lead to reflecting，where you become lost in your emotions.Writing forces you to slow down.The mere act of labeling a feeling—of putting words to an emotion—can lessen the nervous activity in the threat area of the brain.Writing can increase someone's acceptance of his experience，and acceptance is calming.

A．Why write
B．What if you don't write
C．It can also help improve mood，sleep and memory
D．Expressive writing gave people the courage to face fears
E．It shouldn't be used as a replacement for other treatments
F．The first important step is to recognise what it is that is bothering you
G．Psychologists refer to writing about an unpleasant experience as "expressive writing"

發(fā)布：2024/10/27 20:0:1組卷：6引用：3難度：0.5

解析

3．At some time in your life you may have a strong desire to do something strange or terrible．However，chances are that you don't act on your impulse （沖動），but let it pass instead You know that to commit the action is wrong in some way and that other people will not accept your behavior．
One of the newest taboos in American society is the topic of fat．Unlike many other taboos，fat is a topic that Americans talk about constantly．It's not taboo to talk about fat；it's taboo to be fat．The "in" look is thin，not fat．In the work world，most companies prefer youthful-looking executives to sell their image as well as their products to the public．The thin look is associated with youth，vigor and success．The fat person，on the other hand，is thought of as lazy and lacking in energy，self-discipline and self-respect．In an image-conscious society like the US，thin is "in" but fat is "out"．
It's not surprising that millions of Americans have become crazy about staying slim and "in shape"．The pursuit of a youthful physical appearance is not，however，the only reason for America's fascination with diet and exercise．Recent research has shown the importance of diet and exercise for personal health．As in most technologically developed nations，the life style of North Americans has changed dramatically during the course of the last century．Modern machines do all the physical labor that people were once forced to do by hand．Cars and buses transport us quickly from point to point．As a result of inactivity，people's bodies can easily become weak and vulnerable （易受攻擊的）to disease．In an effort to avoid such a fate，millions of Americans are spending more of their time exercising．

（1）From the text we can infer a taboo is considered

．
A．unacceptable in people's eyes
B．popular with people
C．favorable impression left on other people
D．a(chǎn) crime committed on impulse
（2）According to the text we can conclude in American society "being fat"

．
A．hasn't long been a taboo
B．will always remain a taboo
C．may no longer be a taboo some day
D．is not considered a taboo by most people
（3）In the US，thin is "in" but fat is "out" most probably mean

．
A．thin is "lazy" but fat is "kind"
B．thin is "old" but fat is "youthful"
C．thin is "unsuccessful" but fat is "successful"
D．thin is "popular" but fat is "unpopular"
（4）Why are so many Americans exercising more？

A．To keep strong and free from disease．
B．To find good jobs in the companies．
C．To encourage their children．
D．To avoid becoming old．
發(fā)布：2024/10/27 17:0:2組卷：6引用：1難度：0.5
解析

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