Most of us think that when we step under a shower we’re getting clean.We are, but we’re also giving a home to lots of tiny little creatures we didn’t even know about.
A showerhead carries thousands of bacteria (細(xì)菌) called Mycobacterium.These can cause problems like coughs and tiredness, and a general feeling of poorliness (身體不舒服).When you turn on the water, the bacteria go from the showerhead onto and into your body.
This is a finding of Norman R.Pace and his team at the University of Colorado, in the US.The scientists investigated bacteria in all kinds of human environment, including showers.
Pace's team looked at 45 showerheads in nine American cities.They discovered that 30 percent of them had large amounts of flying Mycobacterium.
But Pace said that they pose few threats to the health.Only those with a frail (脆弱的) immune (免疫的) system might need to worry.
He told the New York Times that the bactertia are not as unpleasant as might be thought.He said that having a shower is no more dangerous than anything else we do in the morning.
But for those who feel sick about the idea of all those microorganisms (微生物), he had some advice.
Let the water run for 30 seconds before getting into the shower.Why? The number of bacteria is smaller than when the water is just turned on.If that seems like a waste of water, he added that you could also change your showerhead every few months.
But Pace had good news too.He has also been testing the air in US subways.Apart from iron particles (粒子), which are ground off the track by the wheels of trains, subway air is fresh.The reason is that a train’s movement pumps fresh outdoor air into the tunnels(隧道).
Pace explained that he wanted to understand the natural microbial(微生物的) environments of public places.This kind of knowledge might help detect the microbes to be used in a bioterrorist (生物恐怖分子) attack.
49.According to the finding of Norman R.Pace, after taking a shower, we might ______.
A.get much dirtier B.be covered by bacteria
C.get a frail immune system D.catch a cough or feel tired
50.Pace’s research into showers shows that ______.
A.there is no reason to fear microorganism
B.shower water contains much less bacteria after being left to run for 30 second
C.having a shower in the morning is more dangerous than at other time
D.of 45 showerheads surveyed in nine cities, 30 carried large amounts of Mycobacterium
51.According to the research of Pace’s team, which of the following contributes to fresh air in US subways?
A.Train wheels. B.Iron particles.
C.The movement of the trains. D.Air conditioners on the trains.
52.The word “detect” in the last paragraph probably means “______”.
A.to discover B.to protect C.to make D.to prevent
49---52 DBCA
49.D考查細(xì)節(jié)理解。第二段說,淋浴的噴頭上有數(shù)以千計的細(xì)菌,使用者會引起咳嗽、疲勞、身體不舒服的癥狀。
50.B考查細(xì)節(jié)理解。從第八段可知B項陳述正確。
51.C考查細(xì)節(jié)理解。第九段說,他們的研究發(fā)現(xiàn),地鐵列車的來回移動將外面的空氣抽到隧道里,因此地鐵的空氣很新鮮。
52.A考查猜測詞義。從語境看,劃線詞表示了解公共場合的自然微生物環(huán)境,了解這方面的知識能幫助我們“監(jiān)測/發(fā)現(xiàn)”恐怖分子的生物攻擊所使用的微生物。
科目:高中英語 來源:2016屆河北省高一上學(xué)期二調(diào)考試英語試卷(解析版) 題型:完型填空
When we read books we seem to enter a new world. This new world can be similar to the one we are living in, or it can be very . Some stories are told they were true. Real people who live in a world do real things; in other words, the stories are about people just like us doing what we do. Other stories, such as the Harry Potter books, are not . They are characters and creatures that are very different from us and do things that would be for us.
But there is more to books and writing than this. If we think about it, even realistic writing is only . How can we tell the difference between what is real and what is not real? For example, when we read about Harry Potter, we seem to learn something about the real world. And when Harry studies magic at Hogwarts, he also learns more about his real life than . Reading, like writing, is an action. It is a way of . When we read or write something, we do much more than simple look at words on a page. We use our -- which is real-- and our imagination-- which is real in a different way --- to make the words come to life in our minds. www.zxxk.com
Both realism and fantasy(幻想) the imagination and the “magic” of reading and writing to make us think. When we read realistic, we have to imagine that the people we are reading about are just like us, even though we that we are real and they are . It sounds , but it works. When we read, we fill in missing information and about the causes and effects of what a character does. We help the writer by 52 that what we read is like real life. In a way, we are writing the book, too.
Most of us probably don’t think about what is going on in our when we are reading. We pick up a book and lose in a good story, eager to find out what will happen next. Knowing how we feel we read can help us become better readers, and it will help us discover more about the real magic of books.
1.A. possible B. easy C. new D. different
2.A. that B. what C. whether D. as if
3.A. usual B. normal C. certain D. common
4.A. realistic B. reasonable C. moral D. instructive
5.A. difficult B. impossible C. important D. necessary
6.A. thinkable B. designed C. imagined D. planned
7.A. do B. make C. have D. are
8.A. lessons B. dreams C. experience D. magic
9.A. working B. thinking C. living D. understanding
10.A. knowledge B. skill C. words D. grammar
11.A. make B. get C. use D. have
12.A. a newspaper B. something C. everything D. a story
13.A. find B. learn C. know D. hope
14.A. too B. not C. all D. so
15.A. dangerous B. serious C. strange D. terrible
16.A. talk B. learn C. read D. think
17.A. telling B. pretending C. promising D. guessing
18.A. mind B. life C. world D. society
19.A. heart B. time C. money D. ourselves
20.A. what B. how C. when D. why
查看答案和解析>>
科目:高中英語 來源:2015屆四川成都南片區(qū)六校聯(lián)考高二上學(xué)期期中考試英語試卷(解析版) 題型:閱讀理解
Cast your mind back to the past twenty years and hardly did anyone have their own email account. The Internet had just taken off in 1991 and people were only using office and PCbased email exchanges.
In the mid 1990s external email providers appeared. The most famous of these was Hotmail, the first free email provider and webbased email service. Sabeer Bhatia and Jack Smith launched Hotmail on July 4, 1996. And Microsoft took note of and bought Hotmail for $400 million on December 30, 1997, a nice birthday present for Bhatia who turned 29 that day. It was relaunched as MSN Hotmail and in 2007 was relaunched again as Windows Live Hotmail.
Fast forward the present day and most of us have at least a personal webbased email account. It seems impossible to live without them. One of the biggest advantages of email is the fact that communication has become so much easier, especially with those across different time zones. Email takes seconds to send a message whereas letters, as we used to communicate by, could take weeks. Of course there was the fax, that beeping invention from the 1980s, but it wasn’t as secure as email and you never knew if the person on the other end had picked up your fax or if it had got lost somewhere in the office.
In conclusion, one of the best inventions from the 1990s has to be email. But sometimes people are too closely connected to their email and have a compulsion to check it several times a day. At work, people have become lazy and instead of going to speak to the person sitting next to them, they send an email,causing an in box to pile up with more time spent reading email and responding rather than working. Clearly, an invention that saved time because of its quick and speedy connection can now also cause us to waste a lot of time.
1.The earliest web-based email came into being probably _______.
A. in 1991 B. in 1996 C. in 1997 D. in 2007
2.The author mentions “fax” in the third paragraph in order to tell us that _______.
A. it is exactly as good as email
B. it is much better than email
C. it is less convenient than email
D. it is easier and faster than email
3.The underlined word “compulsion” in Paragraph 4 probably means “_______”.
A. strong desire B. common sense C. special curiosity D. general idea
4.Which is the main idea of the last paragraph?
A. We should check email boxes frequently.
B. Lazy people like sending an email.
C. Email brings us great convenience.
D. Good inventions also cause problems.
查看答案和解析>>
科目:高中英語 來源:2012-2013學(xué)年湖北省高三下學(xué)期第二次月考英語卷(解析版) 題型:閱讀理解
Shakespeare, more perhaps than any other writer, made full use of the greatest resources of the English Language.Most of us use about five thousand words in our normal employment of English; Shakespeare in his works used about twenty-five thousand! There is probably no better way for a foreigner to appreciate the richness and variety of the English language than by studying the various ways in which Shakespeare uses it.Such a study is well worth the effort, even though some aspects of English usage, and the meaning of many words, have changed since Shakespeare’s day.
However, it is surprising that we should know comparatively little about the life of the greatest English author.We know that Shakespeare was born in 1564 in Stratford-on-Avon, and that he died there in 1616.He almost certainly attended the Grammar School in the town, but of this we cannot be sure.We know he was married there in 1582 to Anne Hathaway and that he had three children.We know that he spent much of his life in London writing his masterpieces.But this is almost all that we do know.
However, what is important about Shakespeare’s life is not its incidental details but its products, the plays and the poems.For many years scholars have been trying to add a few facts about Shakespeare’s life to the small number we already possess and for an equally long time critics have been theorizing about the plays.Sometimes, indeed, it seems that the poetry of Shakespeare will disappear under the great mass of comment that has been written upon it.
Fortunately this is not likely to happen.Shakespeare’s people have long delighted not just the English but lovers of literature everywhere, and will continue to do so after the scholars and critics and all their works have been forgotten.
1.This passage is about .
A. the great length of each chapter
B. the great varieties in writing styles
C. the richness of the content in Shakespeare’s works
D. the rich English language used by Shakespeare in his works
2. According to the writer, which of the following remains uncertain about Shakespeare?
A. His date of birth
B. His marriage
C. His life in the Grammar School
D. His date of death
3.It can be inferred from Para 3 that
A. not all the comments on Shakespeare’s works have produced good effects
B. scholars have successfully collected facts about Shakespeare’s life
C. critics are more interested in Shakespeare’s play than his poetry
D. the details of Shakespeare’s life are more important than his literary works
4. What does the last sentence in Para 3 mean ?
A. People don’t think the poetry of Shakespeare good any more.
B. People pay more attention to the comment than the poetry of Shakespeare.
C. People can’t see the poetry of Shakespeare any more.
D. The comment is printed on the poetry of Shakespeare.
查看答案和解析>>
科目:高中英語 來源:2015屆陜西寶雞中學(xué)高一下期期末考試英語卷(解析版) 題型:填空題
Pay Attention to the Organization of an Article.
Check Your Understanding.
Lightning Speed Exercise
Set Aside Time Each Day.
Check Your Progress through Pacing
Speed up When Necessary.
1.______
Most of us can find 15 minutes or half an hour each day for some specific regular activity. For example, one famous surgeon always made it a rule to spend at least 15 minutes on general reading before he went to sleep each day. Whether he went to bed at 10 p.m. or 2:30 a.m. made no difference.
2.______
Nearly all ‘speed reading’ courses have a ‘pacing’ element---some timing device which lets the students know how many words a minutes he is reading. You can do this simply by looking at your watch every 5 or 10 minutes and noting down the page number you have reached.
3.______
Obviously there is little point in increasing your reading speed if you do not understand what you are reading. If you find you have lost the thread of the story, or you can’t remember clearly the details of what was said, re-read the section or chapter.
4.______
Take four or five pages of an interesting book you happen to be reading at the time. Read them as fast as you possibly can. Do not bother about whether you understand or not. After a ‘lightning speed’ of reading, you will usually find that your ‘normal’ speed has increased.
5.______
Most paragraphs in an article have a ‘topic sentence’ which expresses the central ideas. The opening paragraph often suggests the general direction and content of the piece, while paragraphs that follow expand or support the first. The closing paragraph often summarizes the very essence(實質(zhì)) of what has been said.
查看答案和解析>>
科目:高中英語 來源:2014屆浙江省紹興市高二下學(xué)期階段性考試英語試卷(解析版) 題型:單項填空
Einstein’s Theory of Relativity is so ________that most of us can not understand it.
A.controversial B.a(chǎn)bstract
C.a(chǎn)ppropriate D.universal
查看答案和解析>>
湖北省互聯(lián)網(wǎng)違法和不良信息舉報平臺 | 網(wǎng)上有害信息舉報專區(qū) | 電信詐騙舉報專區(qū) | 涉歷史虛無主義有害信息舉報專區(qū) | 涉企侵權(quán)舉報專區(qū)
違法和不良信息舉報電話:027-86699610 舉報郵箱:58377363@163.com