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
Here in the United States, before agricultural activities destroyed the natural balance, there were great migrations of Rocky
Here in the United States, before agricultural activities destroyed the natural balance, there were great migrations of Rocky
admin
2017-06-15
77
问题
Here in the United States, before agricultural activities
destroyed the natural balance, there were great migrations of Rocky
Mountain locusts(蝗虫). Great migrating hordes of these insects
once darken the skies on the plains east of the Rockies where crops【S1】______
were often destroyed; the worst years were those between 1874 to【S2】______
1877. One of these migrating swarms was estimated to contain 1. 24
billion locusts. During the another migration in Nebraska it was【S3】______
estimated that the swarm of locusts averaged half a mile high and
was 100 miles wide and 300 miles long. Usually, these swarms take
up from the ground against the wind, but, once airborne, they turn【S4】______
and fly with it. Warm convection currents(对流)help to lift them,
often at great heights. During the great locust plagues the situation【S5】______
in Nebraska became so serious that the original state constitution
had to be rewritten to take care the economic problems. The new【S6】______
document was known as "The Grasshopper Constitution". It is now
believed that these locusts were a migratory form or phase of the
lesser migratory locust, that is still common there. In this respect,【S7】______
the North American migratory locusts resemble their African
relatives. In both regions the migratory forms rise as a result of【S8】______
crowding and climatic factors. Migratory forms are apparently
natural adaptations which bring about dispersal when locust
populations become too crowded. Unfortunately for our farmers, the【S9】______
migratory form no longer seems to occur regularly, although there
was a serious outbreak as late as 1938 in midwestern United States
and Canada. Actually, there is no reason why the destructive
migratoiy form might not again appear if circumstances become【S10】______
favorable.
【S7】
选项
答案
that—which
解析
关系代词误用。在引导非限制性定语从句时,用which而不用that。
转载请注明原文地址:https://kaotiyun.com/show/nUsK777K
0
专业英语八级
相关试题推荐
Thereisnotmuchtochoosebetweenmen.Theyareallahotchpotchofgreatnessandlittleness,ofvirtueandvice,ofnobility
Howwasitpossible,Iaskedmyself,towalkforanhourthroughthewoodsandseenothingworthyofnote?Iwhocannotseefind
Formany,thepursuitofhappinessisalsothepursuitofprosperity.PartoftheAmericandreamistheabilitytoprovide【M1】__
Stoppingcigarettesmokinghasbecomeabigproblemforallgovernments.Indemocraticcountries,theeconomicstrengthofthe
CableTVhasexperiencedtremendousgrowthasanadvertisingmediumbecauseithassomeimportantadvantages.Aprimaryoneis
ApprenticeshipshavelongbeenpopularinEurope,butworkforce-orientedhighschooltrainingisnearlyascommonin【M1】______U
Womenweremorelikelythanmentoreporthavingunderstandingsaboutsaferbehavior,suchasagreeingnottogetdrunk(23per
Pre-courseLectureof"AmericanNovelSince1945"Tolearnthelectureof"AmericanNovelSince1945",somepointsshouldb
Ifourbrainswerecomputers,we’dsimplyaddachiptoupgradeourmemory.Thehumanbrain,therefore,ismore【M1】______comple
Moreandmorepeopleliveintownsandcitiesinsteadonfarmsandinvillages.
随机试题
Itiswidelybelievedthathighlyeducatedstudentsaremorelikelytogetagoodjob.However,atanon-campusjob【C1】______in
A、医疗用药的重大问题B、基本用药目录和处方手册C、贯彻执行药政法规的情况D、用药计划E、新制剂医疗机构药事管理委员会的任务之一是制(修)订本院
A.牙源性角化囊性瘤B.含牙囊肿C.根尖周囊肿D.黏液囊肿E.鳃裂囊肿可发生成釉细胞瘤变的囊肿是
加工贸易企业申请放弃的保税加工货物属于国家禁止或限制进口的,海关将做出不予放弃的决定。()
提运单号栏应填:标记唛码及备注栏应填:
下列关于基金职业道德修养的说法,错误的是()。
根据营业税改征增值税的有关规定,下列说法不正确的是()。
下列属于资本市场特点的有()。
在下列汇编语言的指令中,执行后AL寄存器的值是()。MOVAL,OBFH,ORAL,OFCH
Certainlynocreatureintheseaisodderthanthecommonseacucumber.Alllivingcreature,especiallyhumanbeings,havetheir
最新回复
(
0
)