The biggest advantage of Post-it Notes is . A. it can stay anywhere and leave no sign when ——青夏教育精英家教网—

摘要： The biggest advantage of Post-it Notes is . A. it can stay anywhere and leave no sign when removed B. it is very cheap to use C. it is good to write notes on D. it is very thin and beautiful CBADA 7(河南省郑州市盛同学校高一第一次月考) In the United States, the term "organic" has a legal meaning set by the Department of Agriculture. The department has an official label to mark products that have met the requirements of its National Organic Program. Organic products usually cost more, but their sales are growing. As a result, so is competition to label more products organic because many people believe they are healthier. Now Agriculture Department officials are trying to decide whether fish can be called organic. There are rules for organic produce, organic dairy products, organic meat and chicken -- but nothing about fish. Many operators of fish farms believe they could sell more fish if they could label them organic. The industry that sells wild-caught fish is already under pressure from farm-raised seafood. That pressure could increase if the Agriculture Department approves proposed requirements for labeling fish organic. Earning the organic label requires controlled conditions. The question is whether fish that swim wild and free -- like Alaskan salmon -- could meet the proposed requirements. Yet fish farms might not all be able to meet them, either. Some operations are criticized for their treatment of fish and the risk of pollution to waterways. Fish farmers and the wild-caught industry also argue about the possible presence of harmful chemicals in each other's products. In 2000, an advisory committee considered requests by fish farmers to call their products organic. The experts said farm-raised fish should be labeled organic only if they were fed almost completely organic plant food. Farmed fish often have little or no fish in their diet. But those proposed guidelines were not used. In 2005, the Agriculture Department formed another group to examine possible requirements. This time, the committee suggested several kinds of food that farmed fish could eat and still be called organic. A decision about whether fish can be sold with the organic label may still take two years or more. For now, the American fishing industry has to deal with growing competition from imported seafood. Some foreign companies already call their fish "organic" because, they say, it meets the requirements of their own countries.

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　　Some inventions are so useful, but seem so simple, that we wonder why no one thought of them long ago. Post－it Notes－the pieces of paper that you can fasten(固定)almost anywhere and then remove without leaving any sign that they were there=are an example of such an invention.

　　Post－it Notes were invented about twenty years ago by Art Fry, a scientist at 3M Corporation. The idea for the product came from a frustrating(令人沮丧的)experience he often had while singing in his church choir(唱诗班). Fry used pieces of paper as bookmarks to mark the places in his book of songs, but these bookmarks were always falling out. He knew he needed a bookmark that would stay where he put it, but that he could remove without damaging the pages.

　　Around that time, Fry heard about a new adhesive(粘合剂)that a colleague(同行), Dr. Spence Silver, had created. This adhesive was special because it was sticky, but not too sticky. It was strong enough to hold papers together, but weak enough to not tear the paper when it was removed. Fry saw that the new adhesive could help solve his bookmark problem. One morning, Fry put some of the adhesive on the edge of a piece of paper. Just as he hoped, it made a perfect bookmark.

　　A short time later, Fry realized that his new invention had even more uses than being a great bookmark. He came to this realization when he wrote a note on one of his new “bookmarks” and attached(附着)it to a report he was going to give to a colleague. Soon, co－workers were asking Fry for more samples (样品)of his invention so that they could use the new type of notes themselves.

　　Fry and some other people at 3M believed so much in the new product that they persuaded the company to give away thousands of the “sticky pieces of paper” for trial(试验)use. When some salespeople at 3M went to offices and showed workers just how helpful the new type of notes could be, they immediately received many orders. As more and more people discovered how useful Post－it Notes could be, the product took off.

1．The invention of Post－it Notes showed that Art Fry ________.

[　　]

A．had a lot of knowledge

B．was very hard－working

C．was good at creative(创造性的)thinking

D．loved his job in the church

2．In what way did Dr. Spence help Art Fry?

[　　]

A．They worked together and often discussed science.

B．His invention of a special adhesive made Art's invention possible.

C．He persuaded 3M Corporation to give away lots of Post－it Notes for trial use.

D．He cooperated with Art by providing the new adhesive for Art.

3．Which of the following is a possible use of Post－it Notes?

[　　]

A．A note on a friend's door.

B．An E－mail to a friend.

C．A postcard from abroad.

D．An ad in a newspaper.

4．The underlined phrase “too off” means ________.

[　　]

A．started to leave the ground

B. disappeared from the market

C. had even more uses

D．became popular very quickly

4．The biggest advantage of Post－it Notes is ________.

[　　]

A．it can stay anywhere and leave no sign when removed

B．it is very cheap to use

C．it is good to write notes on

D．it is very thin and beautiful

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