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
Scientists have known for some time that certain plants, called hyperaccumu-lators, can concentrate minerals at levels a hundred
Scientists have known for some time that certain plants, called hyperaccumu-lators, can concentrate minerals at levels a hundred
admin
2014-09-29
40
问题
Scientists have known for some time that certain plants, called hyperaccumu-lators, can concentrate minerals at levels a hundredfold or greater than normal. A survey of known hyperaccumulators identified that 75 percent of them amassed nickel; cobalt, copper, zinc, manganese, lead, and cadmium are other minerals of choice. Hyperaccumulators run the entire range of the plant world. They may be
herbs
,
shrubs
, or
trees
. Many members of the mustard family, spurge family, legume family, and grass family are top hyperaccumulators. Many are found in tropical and subtropical areas of the world, where accumulation of high concentrations of metals may
afford
some protection against plant-eating insects and microbial pathogens.
The word "
afford
" in the passage is closest in meaning to
选项
A、offer
B、prevent
C、increase
D、remove
答案
A
解析
转载请注明原文地址:https://jikaoti.com/ti/jyhYFFFM
0
托福(TOEFL)
相关试题推荐
Whatproblemsdothespeakersidentifyforeachexperiment?ChooseyouranswersfromtheboxandwritethelettersA-Hnexttoq
Questions14-16Choosethecorrectletter,A,BorC.LongfieldParkFortheactivityonSaturday,visitorsshould
Whatiscurrentlythemainareaofworkofeachofthefollowingpeople?ChooseFIVEanswersfromtheboxandwritethecorrect
Whatisthetutor’sopinionofthefollowingcompanyprojects?ChooseFIVEanswersfromthebox,andwritethecorrectletter,A
Choosethecorrectletter,A,BorC.GENERALCOURSEDETAILSAMedicalSciencecoursewillbeopenednextyearbecause
Completethesentencesbelow.WriteNOMORETHANTHREEWORDSforeachanswer.Inthehome,oneofthemostimportantusesofwa
Whatisthemainopinionofeachofthefollowingpeople?ChooseFIVEanswersfromtheboxandwritethecorrectletter,A-G,ne
ChooseTHREEletters,A-F.WhichTHREEthingsarethestudentsrequiredtosubmittotheirprofessor?AawrittensummaryBnote
Completethenotesbelow.WriteONEWORDONLYforeachanswer.DevelopmentStudiesDevelopmentStudiesattemptstounderstand-
TheTawnyOwlMost【L31】________owlspeciesinUKStronglynocturnalHabitatMainlylivesin【L32】________,butcanalsobeseeni
随机试题
对于下列疾病禁用头孢菌素的是
肛周脓肿首选的手术方法是高位肛瘘的手术方法应选用
A.固阴煎B.六味地黄丸C.大补元煎D.左归丸E.归肾丸经乱无期,出血淋漓不尽,色鲜红,质稍稠,头晕耳鸣,腰膝酸软。治疗应首选()
在吊装现场的下列人员中,需要持证上岗的特种作业人员是()。
下列说法正确的是()。
从房地产投资项目不同方案之间的关系来看,混合型方案属于()方案类型。
()主要应用于生产企业。它是由企业采购人员制定采购计划而进行采购的。
思维形式障碍包括()。
革命老区
1948年,毛泽东在《在晋绥干部会议上的讲话》中完整地表述了总路线的内容,即无产阶级领导的,人民大众的,反对帝国主义、封建主义和官僚资本主义的革命。新民主主义总路线正确解决了以下一系列问题
最新回复
(
0
)