首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
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 th
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 th
admin
2016-04-30
75
问题
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 Bah Abba found a solution. He developed the "Pot-in-Pot Preservation/Cooling System." It uses 2 round containers made of clay. A smaller pot is placed inside a larger one.
The space between the 2 pots is filled with wet sand. The inner pot can be filled with fruit, vegetables or drinks. A wet cloth covers the whole cooling system.
Food stored in the smaller pot is kept from spoiling through a simple evaporation process. Water in the sand between the 2 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 5,000 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 2 years. The most recent one was given last year.
In Mohammed Bah Abba’s cooling system, the evaporation process is used to_____.
选项
A、prevent the loss of water
B、cause dry and wet air to exchange
C、keep the stored food dry
D、take heat away from the inner pot
答案
D
解析
第5段和第6段的内容表明“蒸发过程”可以使里面的小罐子温度降低,从而起到冷藏、保存食物的目的,D“将热量带走”也就意味着“温度降低”,两者的意义相同,因此,本题应选D。
转载请注明原文地址:https://kaotiyun.com/show/nSe7777K
0
大学英语四级
相关试题推荐
Solongasteachersfailtodistinguishbetweenteachingandlearning,theywillcontinuetoundertaketodoforchildrenthatw
SixSecretsofHigh-EnergyPeopleA)There’sanenergycrisisinAmerica,andithasnothingtodowithfossilfuels.Millionsof
Teachingchildrentoreadwellfromthestartisthemostimportanttaskofelementaryschools.Butrelyingoneducatorstoappr
Differentthingsusuallystandfordifferentfeelings.Red,forexample,isthecoloroffire,heat,bloodandlife.Peoplesay
Differentthingsusuallystandfordifferentfeelings.Red,forexample,isthecoloroffire,heat,bloodandlife.Peoplesay
Childrenwhospendmorethantwohoursadayatacomputerorwatchingtelevisionaremorelikelythanotherstohavementalpro
Imagineananimalthatbecomesfrozenincoldweather.Then,whenitgetswarmer,theanimalsimplyunfreezesandgoesbacktoi
Therearetwotypesofpeopleintheworld.Althoughtheyhaveequaldegreesofhealthandwealthandtheothercomfortsoflife
Theconceptofculturehasbeendefinedmanytimes,andalthoughnodefinitionhasachieveduniversalacceptance,mostofthede
Todaywetalkaboutthedifferencebetweenacollegeandauniversity.Collegesanduniversitieshavealotincommon.Theyprep
随机试题
女性,45岁,颈部不适,左上肢放射痛伴感觉障碍,考虑为颈椎病,神经根型,以下治疗措施中哪一项不宜采用
关于无效施工合同工程款的结算,正确的是()。
南云公司为上市公司,属于增值税一般纳税人,存货适用的增值税税率为17%;主要从事机器设备的生产和销售,销售价格为公允价格(不含增值税额),销售成本逐笔结转。2017年度,南云公司有关业务资料如下:资料一:1月31日,向甲公司销售100台A机器设备,单位销
社会主义精神文明在社会主义现代化建设中的重要战略地位和作用表现在()。
2006年7月1日,青藏铁路开始客车试运营。火车在其发明了近200年之际终于开到了世界屋脊之上。最早的火车机车的发明者是()。
在生物群落的地带性分布中,起支配作用的是______。
2019年是中俄建交70周年,应俄罗斯总统普京邀请,6月5日至7日,习近平主席对俄罗斯进行军事访问并出席第二十三届圣彼得堡国际经济论坛,在中俄建交70周年纪念大会讲话中,习近平对“新时代的中俄关系”提出的主张是()。
计算机指令一般包括操作码和地址码两部分,为分析执行一条指令,其(5)。
南京是中国东部重要的政治、文化和金融中心。自三国时期(theThreeKingdomsPeriod)开始,先后有六个朝代在此建都,因此南京有“六朝古都”(theAncientCapitalofSixDynasties)的美誉。南京城建于明朝
A、Powerplantsbumcoal.B、Factoriespoursewage.C、PeopleburytrashundergroundD、Citypopulationincreasesgreatly.A
最新回复
(
0
)