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A few degrees can make a big difference when it comes to food storage.Foods can go bad if they get too warm.But for many of the world’s poor, finding a good way to keep food cool is difficult.Refrigerators are costly and they need electricity.

       Yet spoiled food not only creates health risks but also economic losses.Farmers lose money when they have to throw away products that they cannot sell quickly.

       But in 1995, a teacher in northern Nigeria named Mohammed Bath Abba found a solution.He developed the “Pot-in-Pot Preservation/Cooling System.” It uses two round containers made of clay.A smaller pot is placed inside a larger one.

       The space between the two pots is filled with wet sand.The inner pot can be filled with fruit, vegetables or drinks.A piece of wet cloth covers the whole cooling system.

       Food stored in the smaller pot is kept from spoiling through a simple evaporation (蒸发) process.Water in the sand between the two pots evaporates through the surface of the larger pot, where drier outside air is moving.

       The evaporation process creates a drop in temperature of several degrees.This cools the inner pot and helps keep food safe from harmful bacteria.Some foods can be kept fresh this way for several weeks.

       People throughout Nigeria began using the invention.And it became popular with farmers in other African countries.Mohammed Bah Abba personally financed the first five thousand pot-in-pot systems for his own community and five villages nearby.

       In 2000, the Rolex Watch Company of Switzerland honored him with the Rolex Award for Enterprise.This award recognizes people trying to develop projects aimed at improving human knowledge and well-being.

       A committee considers projects in science and medicine, technology, exploration and discovery, the environment and cultural history.Winners receive financial assistance to help develop and extend their projects.

       The award is given every two years.The next one will be given in 2008.

1.According to the text, why will the food in the inner pot not go bad?

       A.The temperature is lower than the outside.

       B.Both of the pots are made of clay.

       C.It is covered with a wet cloth.

       D.Drier air is moving outside the pots.

2.What makes foods go bad if they get too warm according to the text?

       A.The water in the food.                                                                                      B.The air around the food.

       C.The harmful bacteria.                                                                                              D.The writer doesn’t mention it.

3.Rolex Watch Company gave Mohammed Bah Abba an award because _________ .

       A.he saved lots of energy                                                                                        B.he made contribution to common people

       C.he was more than a good teacher

       D.he made a great discovery in Africa

4.From the text we can infer this article was probably written in _________.

       A.1995       B.1996          C.2000           D.2007

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【小题1】
A.competeB.persevereC.struggleD.preservation
【小题2】
A.restB.declineC.quitD.regret
【小题3】
A.campusB.downtownC.farmD.country
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A.confidentB.uncertainC.ambitiousD.proud
【小题5】
A.shapeB.instructC.organizeD.lead
【小题6】
A.amazingB.disturbingC.meaningfulD.unsatisfactory
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A.reached outB.put outC.gave outD.made out
【小题8】
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【小题9】
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Sibling competition was identified as an important shaping force as early as in 1918. But more recently, researchers have found many ways in which brothers and sisters are a lasting force in each others’ lives. Dr. Annette Henderson says firstborn children pick up vocabulary more quickly than their siblings. The reason for this might be that the later children aren’t getting the same one-on-one time with parents. But that doesn’t mean that the younger children have problems with language development. Later-borns don’t enjoy that much talking time with parents, but instead they harvest lessons from bigger brothers and sisters, learning entire phrases and getting an understanding of social concepts such as the difference between “I” and “me”. 

A Cambridge University study of 140 children found that siblings created a rich world of play that helped them grow socially. Love-hate relationships were common among the children. Even those siblings who fought the most had just as much positive communication as the other sibling pairs.

One way children seek more attention from parents is by making themselves different from their siblings, particularly if they are close in age. Researchers have found that the first two children in a family are typically more different from each other than the second and third. Girls with brothers show their differences to a maximum degree by being more feminine than girls with sisters. A 2003 research paper studied adolescents from 185 families over two years, finding that those who changed to make themselves different from their siblings were successful in increasing the amount of warmth they gained from their parents.

1.In terms of language development, later-borns ________.

A.get their parents’ individual guidance

B.learn a lot from their elder siblings

C.experience a lot of difficulties

D.pick up words more quickly

2.What was found about fights among siblings?

A.Siblings hated fighting and loved playing.

B.Siblings in some families fought frequently.

C.Sibling fights led to bad sibling relationships.

D.Siblings learned to get on together from fights.

3.The word “feminine” (in Para. 4) means “_______”.

A.having qualities of parents

B.having qualities of women

C.having defensive qualities

D.having extraordinary qualities

 

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