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
考研
Invasive weeds are a serious problem in Australia Weeds【C1】______the biodiversity of Australia’s unique waterways, National Park
Invasive weeds are a serious problem in Australia Weeds【C1】______the biodiversity of Australia’s unique waterways, National Park
admin
2017-11-28
40
问题
Invasive weeds are a serious problem in Australia Weeds【C1】______the biodiversity of Australia’s unique waterways, National Parks, and National Heritage listed areas. By out-competing native plant species, weeds threaten their survival and reduce the plant diversity needed to【C2】______indigenous insects, birds and animals. Changes to the natural flora cover can【C3】______other negative environmental impacts, including increased soil erosion and greater bushfire intensities that further damage the land and the native organisms that【C4】______ it.
Agriculturally, weed species can reduce or contaminate crop yields【C5】______poison or injure livestock, decreasing productivity. Farmers are often forced to invest significant amounts【C6】______ controlling invasive species on their properties, adding to the costs of production.
Most weeds in Australia were, and still are,【C7】______introduced for agricultural or ornamental purposes. 【C8】______these plants have formed the basis of important industries and beautiful gardens, many have also gone on to become serious weeds — 70% of Australia’s weeds are【C9】______garden plants that have "jumped the garden fence" . Some important commercial species, such as the radiata pine and the European olive, are also serious environmental weeds.
More than 27,000 species of【C10】______ plants have been introduced to Australia since European colonization, with new species being introduced every year. About 10% of introduced species become naturalized in their new habitat, meaning they can【C11】______ their populations in the wild without human cultivation. One in ten naturalised plants become weeds, and have a negative【C12】______on native biodiversity, agriculture, or both. The price paid for species which become weeds is tremendous, both in economic and environmental【C13】______.
Economically, weeds have been【C14】______to cost Australian agriculture a total of $ 4 billion every year: One in every seven dollars【C15】______farm income is spent on the control of weeds. The health costs of weeds are estimated at over a billion dollars annually, when medical treatment, drugs and time【C16】______work are added up — and money can’t measure the human suffering caused by【C17】______health problems.
Environmentally weeds have caused the【C18】______of four known species of Australian native plants, and 57 more are, or will soon become, threatened because of invasive introduced plants. Species like rubber vine in North Queensland have the potential to destroy entire native ecosystems【C19】______supplanting indigenous vine thickets, threatening native animals as well as plants. Vast areas of Australia and nearly every kind of native ecosystem【C20】______affected by introduced plants, from oceans and waterways to rainforests, grasslands and deserts.
【C8】
选项
A、While
B、Unless
C、Because
D、Since
答案
A
解析
逻辑衔接题。根据空后分句中的have also gone判断,与空格所在句中的have formed相对应。while可用于主从句表示两个同时进行的持续性动作,且强调主句表示的动作延续到从句所指的整个时间,故选[A]。
转载请注明原文地址:https://kaotiyun.com/show/Jpua777K
本试题收录于:
翻译硕士(翻译硕士英语)题库专业硕士分类
0
翻译硕士(翻译硕士英语)
专业硕士
相关试题推荐
中国国际进口博览会(ChinaInternationalImportExpo,简称CIIE)。2017年5月,习近平主席在“一带一路”国际合作【R31】________上宣布,中国将从2018年起举办中国国际进口博览会。2018年
()isalanguagephenomenonwhichreferstoitsmostdirectandspecificmeaningofawordoranexpression.
Readthefollowingquoteandwriteanarticleofabout400wordslongforanewspapertoarguefororagainsttheauthor’sopini
Fortheexecutiveproducerofanetworknightlynewsprogramme,theworkdayoftenbeginsatmidnightasminedidduringsevenye
ProfessorBrightlikestorambleduringherlectures.
NowapaperinSciencearguesthatorganicchemicalsintherockcomemostlyfrom______onearththanbacteriaonMars.
Astatictechnocraticorder,bycontrast,requiresaverydifferentsortofpersonality:adronewhodoeswhatheistoldandsh
AbrahamLincolnturns200thisyear,andhe’sbeginningtoshowhisage.Whenhisbirthdayarrives,onFebruary12,Congresswil
______overeverythingwheneverwewanttomakeadecision,manypeoplebelieve,andwewillhavelesschanceofmakingmistakes.
"Climatechangeisanissuedeterminingourdestinyasmankind—itwilldeterminethewellbeingofallofus,"theGermanchance
随机试题
白前和前胡都具有的功效为
A.癌细胞团中可见角化珠B.癌细胞团漂浮在黏液中C.黏液将癌细胞核推向一侧D.癌细胞排列成条索状鳞状细胞癌的组织学表现是
骨质坏死的X线表现不包括
证券投资基金风险的承担者是()。
一、注意事项1.申论考试与传统的作文考试不同,是分析驾驭材料的能力与表达能力并重的考试。2.仔细阅读给定的资料,按照后面提出的“作答要求”依次作答在答题纸指定位置。3.答题时请认准题号,避免答错位置影响考试成绩。4.作答时必须使用黑
鲁迅的著作不是一天能读完的,《狂人日记》是鲁迅的著作,因此,《狂人日记》不是一天能读完的。下列哪项最为恰当地指出了上述推理的逻辑错误?
在采用SPOOLing技术的系统中,用户作业的打印输出结果首先被送到______。
Myfatherbelievedthatthereweremysteriousforces(神秘的力量)atworkintheworld.Oneday,hewaslecturingmeonthosemysteri
A、42B、28C、10D、4B
A、Becompetentbutavoidbeingtoooutstanding.B、Becompetentandgetalongwellwithhiscolleagues.C、Becompetentandbehon
最新回复
(
0
)