摘要:behave 10. nutritious

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A Battery’s Worst Nightmare(噩梦)

     Portable electronics that can be carried about easily are only as good as their batteries and, let’s face it, batteries aren’t very good, especially when compared with, say, petrol, which packs 100 times a battery’s energy into an equal space. That’s why a large group of mechanical engineers (centered at the Massachusetts Institute of Technology, but with partners at other universities and companies) are hard at work in an effort to replace batteries with a tiny engine that runs on fuel. Imagine a battery-free life!When the fuel runs out in your laptop or mobile phone, you just fill up and go.

    The engine, about the size of a ten-cent coin, starts with a combustion chamber (燃烧室) that burns hydrogen (氢). Its tiny parts are etched onto silicon wafers (硅片) in the same manner that computer parts are imprinted onto integrated circuits (集成电路). The first engine is made up of five wafers. And since these wafers could be produced in much the same way as computer chips, they could probably be produced quite cheaply.

     But the devil in all this nice detail is efficiency(效率). Tiny engine parts don’t always behave like their scaled-up parts of the first engine. Something between the parts can slow down the work, according to Columbia University professor Luc Frechette, one of the engine’s designers. Extreme heat from the combustion chamber is also a problem, often leaking to other parts of the engine.

    The scientists’ goal is to create an engine that will operate 10 times better than batteries do. Frechette says that a complete system, with all parts in place and working, will be set up in the next couple of years, but commercial models aren’t available until at least the end of the next ten years. 

1..

. According to the passage, the title suggests that ________.

    A. batteries should be greatly improved           B. petrol will be used instead of batteries

    C. the time of batteries will be gone forever    D. pollution caused by batteries must be prevented

2..

 What’s the meaning of the underlined word “devil” (In Paragraph 3)?

     A. Problem.            B. Advantage.         C. Invention.                  D. Technique.

3..

 What can we infer from the passage?

A. The new invention doesn’t need any fuel. 

B. The new engine has been produced in quantity.

    C. The new invention is much cheaper than the battery.

    D. The new engine needs to be improved before it’s on sale.

4..

. What is the main purpose of this passage?

    A. To introduce a new invention to readers.        B. To persuade readers not to use batteries.

    C. To show us how the new invention works.   D. To declare when the engine will be on sale.

 

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完形填空

  Are supermarkets designed to persuade us to buy more?When you enter a supermarket,   1   knows better than you do how you will   2  -which way you will walk, where you will   3  , what will make you   4   one product rather than another.When customers go into a shop, they   5   look to their left but move   6   towards the right.So supermarket   7   are usually on the left of the building, and the layout is designed to take shoppers   8   the store, aisle after aisle, from left to right.Then shoppers will pay attention to all the   9  

  Fresh fruit and vegetables are   10   near supermarket entrances.This gives the impression that only   11   food is sold in the shop.  12   food that everyone buys, like sugar and tea are put near each other.They are kept in different aisles so that customers are taken past other   13   foods before they find what they want.In this way, shoppers   14   to buy products that they do not   15  

  People walk quickly through   16   aisles, but they move more slowly in wide aisle and give more attention to the products.One bestselling   17   for products is at the end of aisles, because shoppers slow down to turn into the next aisle.

  Sweets are often placed at children’s   18   at the checkout.While parents are   19   to pay, children   20   the sweets and put them in the trolley.

(1)

[  ]

A.

the assistant

B.

the manager

C.

the leader

D.

the shop owner

(2)

[  ]

A.

behave

B.

select

C.

move

D.

take

(3)

[  ]

A.

go

B.

stop

C.

look

D.

stand

(4)

[  ]

A.

enjoy

B.

ask for

C.

refuse

D.

buy

(5)

[  ]

A.

naturally

B.

simply

C.

easily

D.

hurriedly

(6)

[  ]

A.

down

B.

clockwise

C.

back

D.

ahead

(7)

[  ]

A.

exits

B.

toilets

C.

entrances

D.

centers

(8)

[  ]

A.

into

B.

around

C.

out of

D.

close to

(9)

[  ]

A.

products

B.

signs

C.

prices

D.

shelves

(10)

[  ]

A.

stored

B.

hidden

C.

displayed

D.

bought

(11)

[  ]

A.

daily

B.

nice

C.

necessary

D.

healthy

(12)

[  ]

A.

Important

B.

Basic

C.

Fast

D.

Fresh

(13)

[  ]

A.

good

B.

cheap

C.

expensive

D.

attractive

(14)

[  ]

A.

are invited

B.

are ready

C.

are encouraged

D.

are willing

(15)

[  ]

A.

really need

B.

eat

C.

know

D.

like at all

(16)

[  ]

A.

long

B.

short

C.

high

D.

narrow

(17)

[  ]

A.

location

B.

position

C.

situation

D.

action

(18)

[  ]

A.

hand level

B.

eye level

C.

low level

D.

high level

(19)

[  ]

A.

sitting

B.

asked

C.

waiting

D.

going

(20)

[  ]

A.

search for

B.

call for

C.

look for

D.

reach for

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When I come across a good article in reading newspapers, I often want to cut and keep it. But just as I am about to do so, I find the article on the __1__ side is as much interesting. It may be a discussion of the way to __2__ in good health, or __3__ about how to behave and conduct oneself in society. If I cut the front article, the opposite one is likely to __4__ damage, leaving out half of it or keeping the text __5__ the title. Therefore, the scissors would __6__ before they start, __7__ halfway done when I find out the __8__ result.

Sometimes two things are to be done at the same time, both worth your __9__. You can only take up one of them, the other has to wait or be __10__ up.

But you know the future is unpredictable—the changed situation may not allow you to do what is left__11__. Thus you are __12__ in a difficult position and feel sad. How __13__ that nice chances and brilliant ideas should gather around all at once? It may happen that your life __14__ greatly on your preference of one choice to the other.

In fact that is what __15__ is like: we are often __16__ with the two opposite sides of a thing which are both desirable like a newspaper cutting. It often occurs that your attention is drawn to one thing only __17__ we get into another. The __18__ may be more important than the latter and give rise to divided mind. I __19__ remember a philosopher's remarks, “When one door shuts, another opens in life.” So a casual __20__ may not be a bad one.

 

1.A.front     B.same       C.either     D.opposite

2.A.get      B.keep       C.lead      D.bring

3.A.advice    B.news       C.a theory    D.a report

4.A.suffer    B.reduce      C.prevent    D.cause

5.A.on      B.for       C.without    D.off

6.A.use      B.handle      C.prepare    D.stay

7.A.or      B.but       C.so       D.for

8.A.satisfying  B.regretful    C.surprising   D.impossible

9.A.courage    B.strength     C.attention   D.patience

10.A.given    B.held       C.made      D.picked

11.A.near     B.alone      C.about     D.behind

12.A.filled    B.attracted    C.caught     D.struck

13.A.dare     B.come       C.deal      D.do

14.A.improves   B.changes     C.progresses   D.goes

15.A.study    B.society     C.nature     D.life

16.A.faced    B.supplied     C.connected   D.fixed

17.A.before    B.after      C.until     D.as

18.A.following  B.next       C.above     D.former

19.A.still     B.also       C.once      D.almost

20.A.treatment   B.action      C.choice     D.remark

 

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