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
专升本
The U.S. generates about four billion tons of solid waste a year. More than 90 percent is composed of agricultural and mining wa
The U.S. generates about four billion tons of solid waste a year. More than 90 percent is composed of agricultural and mining wa
admin
2011-04-26
18
问题
The U.S. generates about four billion tons of solid waste a year. More than 90 percent is composed of agricultural and mining wastes. About 3 percent is from industrial wastes. 250 million tons of garbage and refuse come out from homes, schools, office buildings, stores and hospitals.
This mass of metals, paper, food, plastic, rubber and glass which is all mixed together seems of no earthly use to anyone.
Or is it?
Scattered efforts across the country indicate that new technology, properly applied, might someday turn these millions of tons of refuse into an excellent source of raw materials for new uses.
Several new projects are carried out to study the possibility of treating wastes through pyrolysis (高温分解)--a system of reducing refuse to basic chemicals, liquids and gases which have commercial value. In Florida, a special tube system provides automatic transport of refuse to a central collection building.
In short, many new ideas are being tested, and many will be needed, since no one method is likely to prove suitable everywhere.
However, many difficult economic and social questions must be answered before real progress can be made. Can recovered materials compete with new materials? What will be needed as encouragement to make resource recovery work? Will citizens pay the costs of changing our waste system?
The article suggests that garbage and refuse from homes and public places ______.
选项
A、make up the largest percentage of solid wastes
B、make up a small percentage of solid wastes
C、are not really considered in the solid waste problem
D、are considered of no use to the earth
答案
B
解析
本题为细节辨析题。文中提到,由农业和矿业制造的垃圾占垃圾总量的百分之九十,由工业产生的垃圾占百分之三,由此可见由家庭和学校、商店等公共设施产生的垃圾占到总垃圾量的百分之七,比例不大。
转载请注明原文地址:https://kaotiyun.com/show/0LqC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Thegirlwas______ashopassistant;sheisnowamanagerinalargedepartmentstore.
Insteadofresearchingandwritingtheirpapers,somestudents______.Outof300paperscheckedforfakes,______.
WhatwasE.B.White?Whatwastheauthor’spurposeforwritingchildren’sbooks?
Parentsshouldn’t______(favorable)oneoftheirchildrenmorethantheothers.
Abouttwentyofushadbeenfortunateenoughtoreceiveinvitationtoafilmstudio(摄影间)totakepartinacrowd-scene.Althoug
(Regardlessofyourage),youcanmakeanumberofimportantchangesinyourcurrentlifestylethatcanhelpyoutobecomeheal
_______ofthemwasgoodenoughtouse.
Iamnotofthosepeoplewholikeastrenuous(费力的)holiday;Ibelievein______.
Theyoungdriverlookedovertheenginecarefullylestit______ontheway.
Manyyoungpeoplelike______coffee.
随机试题
Hehasplannedto______somemoneyeverymonthsothathecanbuyahouseinthefuture.
糖尿病与下列哪个症状没有关系
为治寒饮伏肺之要药的中药是
在价值工程活动中,产品的必要功能包括()。
某混凝土工程,目标成本为364000元,实际成本为383760元。根据下表相关资料进行项目成本分析。问题:该工程施工项目成本差异是多少?
()两代是中国佛教的创造阶段和鼎盛时期。中国僧人分别以一定的印度佛教经典为依据,开宗立派,创构自己的理论体系,形成了三论宗、天台宗、华严宗(贤首宗)、法相宗(慈恩宗)、律宗、净土宗、禅宗、密宗(真言宗)等八个主要宗派,号称中国佛教的鼎盛时期
幼儿教师在向小班幼儿描述常规时,应避免使用否定性的语句,主要是由于()。
下列关于法的第一层次本质——国家意志的体现,理解不正确的是()。
设y=f(x)二阶可导,且f′(x)>0,f″(x)<0,令△y=f(x+△x)-f(x),当△x<0时,则().
Onemorning,Iwaswaitingatthebusstop,worriedabout【K1】______(be)lateforschool.Thereweremanypeoplewaitingatthe
最新回复
(
0
)