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
Ants as a Barometer of Ecological Change At picnics, ants are pests.But they have their uses.In industries such as mining,fa
Ants as a Barometer of Ecological Change At picnics, ants are pests.But they have their uses.In industries such as mining,fa
admin
2016-07-17
37
问题
Ants as a Barometer of Ecological Change
At picnics, ants are pests.But they have their uses.In industries such as mining,farming and forestry, they can help gauge (测定) the health of the environment by just crawling around and being antsy(坐立不安).
It has been recognized for decades that ants—which are highly sensitive to ecological change—can provide a near-perfect barometer(气压计) of the state of an ecosystem.Only certain species,for instance, will continue to thrive at a forest site that has been cleared of trees.【B1】______And still others will move in and take up residence.
By looking at which species populate a deforested area, scientists can determine how "stressed"the land is.【B2】______Ants are used simply because they are so common and comprise(构成) so many species.
Where mine sites are being restored, for example, some ant species will recolonize(重新移居到……) the stripped land more quickly than others.【B3】______Australian mining company Capricorn Coal Management has been successfully using ant surveys for years to determine the rate of recovery of land that it is replanting near its German Creek mine in Queensland.
Ant surveys also have been used with mine-site recovery projects in Africa and Brazil,where warm climates encourage dense and diverse ant populations." We found it worked extremely well there,"says Jonathan Major, a professor of environmental biology.Yet the surveys are perfectly suited to climates throughout Asia,he says,because ants are so common throughout the region.As Major puts it:"That’s the great thing about ants."
Ant surveys are so highly regarded as ecological indicators(指示器) that governments worldwide accept their results when assessing(评估) the environmental impact of mining and tree harvesting.【B4】______.
Why not? Because many companies can’t afford the expense or the laboratory time needed to sift(详审) results for a comprehensive survey.The cost stems, also, from the scarcity(缺乏) of ant specialists.【B5】______
A.This allowed scientists to gauge the pace and progress of the ecological recovery.
B Yet in other businesses, such as fanning and property development, ant surveys aren’t used widely.
C.Employing those people are expensive.
D.They do this by sorting the ants, counting their numbers and comparing the results with those of earlier surveys.
E.The evolution of ant species may have a strong impact on our ecosystem.
F.Others will die out for lack of food.
【B5】
选项
答案
C
解析
因为蚂蚁专家人才奇缺,所以雇用他们就会很贵。此外,those指的是前一句的specialists,故选C。
转载请注明原文地址:https://kaotiyun.com/show/W6Ud777K
本试题收录于:
职称英语综合类B级题库职称英语分类
0
职称英语综合类B级
职称英语
相关试题推荐
Thenurseryisbrightandcheerful.
HaveYouFilledUpTheForm?Ofallthingsintheworld,Imostdislikefillingupforms.Infact,Ihavea【51】horrorofit
"Hidden"SpeciesMayBeSurprisinglyCommonCryptic(隐蔽的;隐藏的)species--animalsthatappearidenticalbutaregeneticallyqui
ComputerandSchoolEducationTherewasatimewhenparentswhowantedaneducationalpresentfortheirchildrenwouldbuya
TheNewsIndustryinUSWhydosomanyAmericansdistrustwhattheyreadintheirnewspapers?TheAmericanSocietyofNewspa
TheNewsIndustryinUSWhydosomanyAmericansdistrustwhattheyreadintheirnewspapers?TheAmericanSocietyofNewspa
SmallButWiseOnDecember14,NASAblastedasmallbutmightytelescopeintospace.ThetelescopeiscalledWISEandisabo
A.theyaredirectlyrelatedtoourhealthB.usingsustainablematerialsC.theenvironmentalprotectionD.theworkingconditi
A.theyaredirectlyrelatedtoourhealthB.usingsustainablematerialsC.theenvironmentalprotectionD.theworkingconditi
SharksPerformaServiceforEarth’sWatersItishardtogetpeopletothinkofsharksasanythingbutadeadlyenemy.They
随机试题
目前认为微小病变性肾病最可能的发病机制是
大中桥宜采用触探和取样做土工试验确定地基承载力。()
某机电工程公司承接了电厂制氢系统机电安装工程,其范围包括:设备安装,主要有电解槽、氢气分离器等11台设备的安装;管道安装,包含氢气和氧气管道安装、阀门及附件安装;系统试运行,包括严密性试验、系统冲洗以及系统模拟试验。为了控制工程安装质量,在施工现
沥青混合料的结构类型可分为两类,即按()原则构成和按密实级配原则构成的结构。
背景:甲乙双方于3月1日订立100t的水泥供应合同,合同约定由乙方最迟于4月1日送货至甲公司,甲方按照交货时甲方所在地公布的造价信息作为结算依据,逾期交货1天的违约金为每吨5元。同时,乙方收取了甲方5000元定金。3月1日甲方所在地公布的水泥指导价格为每吨
两种完全正相关的股票组成的证券组合不能抵销任何风险。()
标前会议的主要目的是()。
在炎热的夏天经常会发现自来水管“出汗”,这是由于()。
下列属于体罚学生的情形是()。
下列表达式计算结果为日期类型的是( )。
最新回复
(
0
)