题目内容

   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 (细菌) called Mycobacterium．These can cause problems like coughs and tiredness, and a general feeling of poorliness (身体不舒服)．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  


解析:

49．D考查细节理解。第二段说，淋浴的喷头上有数以千计的细菌，使用者会引起咳嗽、疲劳、身体不舒服的症状。

50．B考查细节理解。从第八段可知B项陈述正确。

51．C考查细节理解。第九段说，他们的研究发现，地铁列车的来回移动将外面的空气抽到隧道里，因此地铁的空气很新鲜。

52．A考查猜测词义。从语境看，划线词表示了解公共场合的自然微生物环境，了解这方面的知识能帮助我们“监测/发现”恐怖分子的生物攻击所使用的微生物。

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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

 

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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.

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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.

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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

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A. His date of birth

B. His marriage

C. His life in the Grammar School

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D. the details of Shakespeare’s life are more important than his literary works

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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．

 

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.

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2.______

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3.______

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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.______

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Einstein’s Theory of Relativity is so ________that most of us can not understand it.

A．controversial                          B．abstract

C．appropriate                            D．universal

 

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