分析 本文主要講述了世界各國都存在的一個普遍現(xiàn)象--食物浪費,以及其會給社會帶來的各方面的影響.
解答 29.B 細(xì)節(jié)題.根據(jù)文章內(nèi)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,光盤行為不僅可以節(jié)約食物,而且還可以幫助減少食物浪費,減輕環(huán)境壓力以及更容易使得整個上漲的世界人口得到糧食,結(jié)合選項,故選B
30.D 詞義猜測題.根據(jù)文章內(nèi)容Agriculture is the world's largest user of water,a big consumer of energy and major emitter of greenhouse gases during production.農(nóng)業(yè)是這個世界上使用水最多的一種情況,在此期間,大量的能源會消耗以及大量的溫室氣體會產(chǎn)生,結(jié)合選項,故D符合文意.
31.A 推理題.根據(jù)文章內(nèi)容,主要講述了可持續(xù)的飲食方式,人們在外就餐時可以點足夠吃的食物,但對于沒有吃完的部分,應(yīng)該打包帶走,那樣既不浪費也不污染環(huán)境,結(jié)合選項,故選A
32.B 推理題.根據(jù)文章最后一段內(nèi)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.講述到在發(fā)達(dá)國家和發(fā)展中國家都存在的食物浪費現(xiàn)象,由此下文應(yīng)該會針對減少浪費這一話題而展開,結(jié)合選項,故選B
點評 本文是科教類閱讀理解.做這類題材閱讀理解時要求考生對文章通讀一遍,做題時結(jié)合原文和題目有針對性的找出相關(guān)語句進(jìn)行仔細(xì)分析,結(jié)合選項選出正確答案.推理判斷題也是要在抓住關(guān)鍵句子的基礎(chǔ)上合理的分析才能得出正確答案,切忌胡亂猜測,一定要做到有理有據(jù)
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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 (噴嘴), which can quickly build a home based on a computer pattern, MSN News reported.
Contour Crafting, as it is named, is a layered fabrication (構(gòu)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.
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