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
Tracking Toxic Chemicals The fireproof chemicals used in furniture and clothing / can become toxic pollutants when winding u
Tracking Toxic Chemicals The fireproof chemicals used in furniture and clothing / can become toxic pollutants when winding u
admin
2016-07-18
40
问题
选项
答案
Tracking Toxic Chemicals The fireproof chemicals used in furniture and clothing / can become toxic pollutants when winding up in the environment. / As they are in the environment all over the world, / tracking the spread of them has been a major challenge. / But it got easier since a new technique has been developed / to measure the presence and concentration of these chemicals in the air by sampling tree bark. / A tree’s bark provides a large surface area that takes in chemicals. / Also, because a layer of bark remains on the tree for years before being shed, / it provides a unique record of the environment over time. / This approach has many advantages over the current sampling method, / which involves pumping air through expensive equipment / and requires plenty of manpower and electricity. / It can be used in developing countries / which don’t have a lot of funding for elaborate atmospheric studies. / Also we can use this method in remote sites where there is no power. /
解析
追踪有毒化学物质
家具和衣物中的防火化学物质落人环境后可能成为有毒污染物。追踪它们的扩散就成为一个难题。自从一项新技术开发出来以后,这个任务就变得较为容易了。该技术通过对树皮进行抽样检验来测量这些化学物质是否存在以及达到什么浓度。另外,由于树皮在脱落前会留在树上很多年,它记录着一段时间内的环境变化。
转载请注明原文地址:https://kaotiyun.com/show/ukPK777K
0
专业英语四级
相关试题推荐
Honestyisavirtue,andtellingalieismorallywrong.Buthowcanyou【C1】______ifsomeone’slying?Theansweris,they’repr
Honestyisavirtue,andtellingalieismorallywrong.Buthowcanyou【C1】______ifsomeone’slying?Theansweris,they’repr
Itisbasedontechnologythatalreadyexists-—it’snotapieintheskyprediction.Theunderlinedpartmeans______.
Theriverisalready______itsbanksbecauseofexcessiverainfall;thecityisthreatenedwithalikelyflood.
EachdayofEarthWeek,forexample,hasbeengivenovertoaseparateenvironmentalissue.Theyare,【C1】______,energyefficien
EachdayofEarthWeek,forexample,hasbeengivenovertoaseparateenvironmentalissue.Theyare,【C1】______,energyefficien
EachdayofEarthWeek,forexample,hasbeengivenovertoaseparateenvironmentalissue.Theyare,【C1】______,energyefficien
"Youknowsomuchaboutliterature.It’sapityyoufailedyourdegree,"Harrysaid,"You______agoodteacher."
Alreadyoverwhelmedchildren’sservicesarefacingrisingdemandasbenefitreformshitstrugglingparents,allwhilecouncilcu
Itwasnotthefirsttimeshe______intheexam.Ithinkit’shightimewe______thetruthtoourheadteacher.
随机试题
某市A外商投资企业(增值税一般纳税人),因拥有自己的核心自主知识产权,以境内、境外全部生产经营所得认定为高新技术企业。2020年生产经营情况如下:(1)取得产品不含税销售收入4500万元;出租2016年4月30日前取得的土地使用权,取得不含税租金收入10
已知点(5,2)为函数z=xy+的极值点,则a,b分别为()
IR序列成像时,不同组织对比度形成的主要决定因素是
评价氯化消毒效果的简便指标是
下列穴位中,最常用的保健穴是
枳壳中具有升压作用的成分为( )。
A、25%氯化钡溶液B、硝酸银试液C、硫酸D、硝酸E、碘化钾试液以下杂质检查项目所使用的试剂是易炭化物
某单位组织党员参加党史、党风廉政建设、科学发展观和业务能力四项培训,要求每名党员参加且只参加其中的两项。无论如何安排,都有至少5名党员参加的培训完全相同。问该单位至少有多少名党员?
把下面的六个图形分为两类,使每一类图形都有各自的共同特征或规律,分类正确的一项是:
下列关于运算符函数的描述中,错误的是()。
最新回复
(
0
)