题目内容

It will be a big help if you go to the store and get what we need for dinner.________， I'll set the table.

A．As a result B．On the whole

C．In the meanwhile D．As a matter of fact

 

C

【解析】C　句意：如果你能去商店买来我们晚餐所需要的东西，这将是一个很大的帮助。同时，我将摆餐具。本题考查介词词组的用法。A：结果；B：大体上；C：同时；D：事实上。根据句意，只有C项合适。

 

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We Chinese have a dream— ________ dream to turn a well?off life into ______ reality by 2020.

A．a; / B．the; / C．a; a D．the; the

 

A well?written composition ________ good choice of words and clear organization.

A．calls on B．calls for

C．calls up D．calls off

 

Lucy is a hard?working and physically active student, ________ has both marks and a fit body.

A．one who B．the one

C．whom D．the person

 

Our refrigerator is ________ again.We'd better buy a new one instead of repairing it.

A．in order B．by order

C．under order D．out of order

 

Paul's mother had him ________ because she couldn't bring him up herself.

A．adapted B．adjusted C．adopted D．applied

 

That coat fits me, but I can't afford to buy ________. I have to choose ________ that is cheap enough for me.

A．one; that B．that; it

C．it; one D．it; the one

 

With the development of modern science and technology, the functions of cellphones have changed greatly. 1. The only difference may be that they fit in your pocket and you pay by the minute to use them. Some of the things a cellphone can do for you will be available this year:

Surf at speed

Cellphones that let you use the Web have been around for years. So, what's new? Well , faster third-generation (3G) networks that let you surf at anywhere. 2. Possible choices are from IJG Electronics VX 8000 and Motorola V1150.Listen as you go.

3. There is no doubt that it is about to change. Sony Ericsson’s new W8001 can hold around 150 songs in its 500 MB memory. And Samsung's SPH-V5400 even comes with a l. 5 GB hard drive. Mobile phones may eventually replace miniMP3 players, especially for teens. Say cheese.

Camera cellphones are not new either but most of them have limitations: around l- megapixel (百万像素 ) . However new technology has made 2-megapixel units more common ,and 3-megapixel units are showing up soon. Some 2-megapixel models, like Sony Ericsson's K7501, offer limited zoom and focus controls. 4. Portable TV.

You say you like "watching TV"? That’s what Samsung MMA700 wants to give you. The new model lets users watch popular TV programmes~ for a fee. Other choices are Nokia's 6620, Sanyo's MM740 and NEC's N940. 5.The above are just a handful of what you ' ll see in the coming months. Further down the road, your mobile phone may play a host of other roles, such as mobile credit card, position locator and so on. So what is there that a cellphone can't do?

A. The NEC model lets you watch public TV - no fee.

B. Without a cellphone, you can do nothing in your daily life.

C. Nowadays, new cellphones are much cheaper than old ones.

D. Today's do-it-all mobiles have a lot in common with the computer.

E. This then allows a carrier to send video, music, and games to your phone.

F. Others, like LG's recent A7110, can even capture 30 minutes of full-motion video.

G. The problem with most cellphone MP3 players is that they hold only a handful of songs.

 

Scientists at Royal Holloway, University of London and Queen Mary, University of London have discovered that bees learn to fly the shortest possible route between flowers even if they discover the flowers in a different order. Bees are effectively solving the “traveling salesman problem”, and they are the first creatures found to do this.

The traveling salesman must find the shortest route that allows him to visit all locations on his route. Computers solve it by comparing the length of all possible routes and choosing the shortest, and it can keep computers busy for days. However, bees solve it without computer assistance using a brain the size of grass seed. Dr. Nigel Raine, from the School of Biological Sciences at Royal Holloway explains, “Bees solve traveling salesman problems every day. They visit flowers at multiple locations and because bees use lots of energy to fly, they find a route which keeps flying to a minimum. ”

The team used the computer to control artificial flowers to test whether bees would follow a route defined by the order in which they discovered the flowers or if they would find the shortest route. After exploring the location of the flowers, bees quickly learned to fly the shortest route.

As well as improving our understanding of how bees move around the landscape pollinating(授粉)crops and wild flowers, this research, which is due to be published in The American Naturalist, has other applications. Our lifestyle relies on networks such as traffic on the roads, information flow on the Web and business supply chains. By understanding how bees can solve their problems with such a tiny brain, we can improve our management of these everyday networks without needing lots of computer time. Dr. Raine adds, “Despite their tiny brains, bees are capable of extraordinary feats of behavior. We need to understand how they can solve the traveling salesman problem without a computer. ”

1. What would be the best title of the passage?

A. Bees help salesmen travel

B. Tiny-brained bees solve a complex mathematical problem

C. How bees discover the flowers

D. How to solve the “traveling salesman problem”

2.We may infer from the second paragraph that the “traveling salesman problem” 　　　.

A. can be solved by a computer easily

B. can’t even be solved by a computer

C. can puzzle both people and computers

D. remains to be solved by scientists

3. The main purpose of the last paragraph is to　　　.

A. provide further proof for the research

B. tell us how bees can fly the shortest route between flowers

C. tell us how the research about bees’ flying route was conducted

D. explain the importance of the research

4. It can be concluded from the passage that　　　.

A. all creatures are smarter than computers

B. the research about bees’ flying route can be applied to many fields

C. our networks are more complex than bees’ ones

D. with the help of the computer we can find out how bees can solve the “traveling salesman problem”

 

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