题目内容

4.Cleaning your plate may not help feed hungry children today,but the timeworn advice of mothers everywhere may help reduce food waste from the farm to the fork,help the environment and make it easier to feed the world's growing population.
Hard data is still being collected,but experts in Chicago said about 30% to 50% of the food produced in the world goes uneaten.The average American throws away 33 pounds of food each month-about $40 worth,which means each person throws away almost 400 pounds of food.The US Department of Agriculture says that 23% of eggs and an even higher percentage of produce ends up in the trash.
"We forget we have all these fresh fruits and vegetables,and at the end of the week we have to throw them away",said Esther Gove,a mother of three young children in South Berwick,Maine."Now,I don't buy as much fresh produce as I used to."
But the effect of food waste arrives far beyond the kitchen.Agriculture is the world's largest user of water,a big consumer of energy and major emitter of greenhouse gases during production.Experts say reducing waste is a simple way to cut stress on the environment and can ease pressure on farmers,who will be called on to feed an expected 9 billion people around the world in 2050,compared with nearly 7 billion today.
No matter how sustainable (可持续的) farming is,if the food's not getting eaten,it's not sustainable and it's not a good use of our resources.In richer nations,fruit and vegetables end up in the trash because they aren't pretty enough to meet companies'standards,have gone bad in a home refrigerator or aren't eaten at a restaurant.In developing countries,much food spoils before it gets to market due to poor roads and lack of refrigeration.High food prices are another reason,since some people can't afford the food that's produced.

29.From the first paragraph,we know that cleaning your plateB.
A.is you mother's best advice for you
B.can solve certain problems for the world 
C.can help feed hungry children all over the world 
D.helps meet the growing population's needs
30.The underlined word"emitter"in Paragraph 4 meansD.
A.user 
B.finder 
C.protector 
D.producer 
31.What is a sustainable and convenient way for a customer in a restaurant?A
A.Ordering enough and packing the leftovers.
B.Ordering more than he or she can eat.
C.Ordering less and feeling hungry after leaving.
D.Ordering more and leaving the untouched alone.
32.Which of the following topics will follow the text?B
A.More examples of food waste 
B.Ways to reduce food waste
C.Experts'idea on the environment
D.Advice for food with high prices.

分析 本文主要讲述了世界各国都存在的一个普遍现象--食物浪费,以及其会给社会带来的各方面的影响.

解答 29.B 细节题.根据文章内容 the timeworn advice of mothers everywhere may help reduce food waste from the farm to the fork,help the environment and make it easier to feed the world's growing population.由此可知,光盘行为不仅可以节约食物,而且还可以帮助减少食物浪费,减轻环境压力以及更容易使得整个上涨的世界人口得到粮食,结合选项,故选B
30.D  词义猜测题.根据文章内容Agriculture is the world's largest user of water,a big consumer of energy and major emitter of greenhouse gases during production.农业是这个世界上使用水最多的一种情况,在此期间,大量的能源会消耗以及大量的温室气体会产生,结合选项,故D符合文意.
31.A 推理题.根据文章内容,主要讲述了可持续的饮食方式,人们在外就餐时可以点足够吃的食物,但对于没有吃完的部分,应该打包带走,那样既不浪费也不污染环境,结合选项,故选A
32.B 推理题.根据文章最后一段内容In richer nations,fruit and vegetables end up in the trash because they aren't pretty enough to meet companies'standards,have gone bad in a home refrigerator or aren't eaten at a restaurant.In developing countries,much food spoils before it gets to market due to poor roads and lack of refrigeration.讲述到在发达国家和发展中国家都存在的食物浪费现象,由此下文应该会针对减少浪费这一话题而展开,结合选项,故选B

点评 本文是科教类阅读理解.做这类题材阅读理解时要求考生对文章通读一遍,做题时结合原文和题目有针对性的找出相关语句进行仔细分析,结合选项选出正确答案.推理判断题也是要在抓住关键句子的基础上合理的分析才能得出正确答案,切忌胡乱猜测,一定要做到有理有据

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Scientists claim to have developed a revolutionary new giant 3D concrete printer that can build a 2,500-square-foot house in just 24 hours.

The 3D printer, developed by Professor Behrokh Khoshnevis from the University of Southern California, could be used to build a whole house, layer by layer, in a single day.

"It is basically scaling up 3D printing to the scale of building," said Khoshnevis.

The giant robot replaces construction workers with a nozzle (喷嘴), which can quickly build a home based on a computer pattern, MSN News reported.

Contour Crafting, as it is named, is a layered fabrication (构造) technology. Using this process, a single house or a colony of houses, each with possibly a different design, may be constructed in a single run, embedded (嵌入) in each house all the wires and pipes for electrical, plumbing and air-conditioning.

The potential applications of this technology are far-reaching including in emergency, low-income, and commercial housing.

"Our research also addresses the application of Contour Crafting in building habitats on other planets. Contour Crafting will most probably be one of the very few feasible approaches for building structures on other planets, such as the Moon and Mars, which are being targeted for human habitation before the end of the new century," researchers said on the project website.

The technology may potentially reduce energy use and emissions. And the main advantages of the Contour Crafting process over existing technologies are the superior surface finish that is realized and the greatly increased speed of construction.

1.Professor Khoshnevis has recently developed a 3D printer that can ________.

A. build a 2500-square-foot house in a single day

B. construct a skyscraper, layer by layer

C. design a group of houses automatically

D. assist construction workers in their work

2.The new 3D printer uses the following to build a house EXCEPT ________.

A. a nozzle B. a computer pattern C. a robot D. an air-conditioner

3.According to the text, the potential applications of Contour Crafting include building _______.

A. emergency vehicles B. low-income housing

C. commercial centers D. space stations on other planets

4.What advantages of this new technology is mentioned in the text?

A. It creates more jobs. B. It is less time-consuming.

C. It saves the building cost. D. It emits no carbon dioxide.

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