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
2018-05-25
80
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/iloK777K
0
专业英语八级
相关试题推荐
Today,Iamgoingtoidentifysometypicalresearchproblemsandalsosharewithyouthesolutionstotheseproblems.Thefirst
Today,Iamgoingtoidentifysometypicalresearchproblemsandalsosharewithyouthesolutionstotheseproblems.Thefirst
Today,Iamgoingtoidentifysometypicalresearchproblemsandalsosharewithyouthesolutionstotheseproblems.Thefirst
A、Itwouldbebesttosignanagreementbeforemarriage.B、Bothparties’responsibilitiesshouldbestipulatedclearly.C、Thete
A、Thelessdiscussionthebetter.B、Themorediscussionthebetter.C、Youmayconsultparents.D、Youmayconsultanadvisor.D本题
SuggestionsofReadingActivitiesI.Three【T1】______phasesofreading【T1】______—beforereading—inthecourseofreading—a
SuggestionsofReadingActivitiesI.Three【T1】______phasesofreading【T1】______—beforereading—inthecourseofreading—a
Oneoftheobviousproblemswithpredictingthefutureeffectsofclimatechangeisthattheyhaven’thappened.Thismakesclima
Oneoftheobviousproblemswithpredictingthefutureeffectsofclimatechangeisthattheyhaven’thappened.Thismakesclima
随机试题
ThescientistsoftheRenaissancebroughtaboutthemostfundamentalalterationsintheworldofthought,andtheyaccomplished
巨幼红细胞性贫血时涂片易见A.球形红细胞B.靶形红细胞C.口形红细胞D.有核红细胞E.点彩细胞
关于新生儿缺氧缺血性脑病的叙述中,不正确的是
A.半夏B.瓜蒌C.白芥子D.川贝母E.桔梗
背景:A市政公司中标地铁区间隧道工程标段,采用盾构法施工。为满足建设方的工期要求,将双线盾构中的右线分包给了具有专业资质的B公司,分包合同约定:工作井土建施工由A公司负责,其余均由B公司负责,A公司配合。在吊装盾构机主体时,出现地面沉陷致使汽车吊向井壁外
久期的计算对所有的现金流采用了不同的收益率,这与实际情况一致。()
已知椭圆,过椭圆左顶点A(-a,0)的直线l与椭圆交于Q,与y轴交于R,过原点与l平行的直线与椭圆交于P,求证AQ,,AR成等比数列.
知道了“长方形的四个顶角都是直角”,而正方形是长方形一个特例,那就很容易理解“正方形的四个顶角都是直角”。这种同化模式属于()。
数据流图用于抽象描述一下软件的逻辑模型,数据流图由一些特定的图符构成。下列图符名标识的图符不属于数据流图合法图符的是______。
Languageisanamazingphenomenon.Speech—the【B1】______ofsoundstoconveymeaning—isakindofhumanaction.Likeanyoth
最新回复
(
0
)