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
52
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.
【S2】
选项
答案
between—from
解析
介词误用。between一般与and连用,而from一般用于from…to...的结构。
转载请注明原文地址:https://kaotiyun.com/show/dloK777K
0
专业英语八级
相关试题推荐
Today,Iamgoingtoidentifysometypicalresearchproblemsandalsosharewithyouthesolutionstotheseproblems.Thefirst
A、Problemsabouttheirwork.B、Problemsaboutinterpersonalrelationship.C、Problemsabouttheirchildren.D、Problemsaboutabi
A、Hehassomementalproblems.B、Heistoooldtoknowwhatheisdoing.C、HewantstohaveagoodChristmas.D、Hehasgotinto
A、Theyaretoobusyworking.B、Theyaren’tawareoftheimportanceofsleep.C、Theyhavesomehealthyproblems.D、Theydon’tthi
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
SuggestionsofReadingActivitiesI.Three【T1】______phasesofreading【T1】______—beforereading—inthecourseofreading—a
SuggestionsofReadingActivitiesI.Three【T1】______phasesofreading【T1】______—beforereading—inthecourseofreading—a
Oneoftheobviousproblemswithpredictingthefutureeffectsofclimatechangeisthattheyhaven’thappened.Thismakesclima
随机试题
衣原体
中外文化的第二次大交汇开端于【】
回弹法检测某构件的混凝土强度,当回弹仪非水平方向弹击且测试面非混凝土的浇筑侧面时,在计算出测区回弹平均值后,应按()的方法修正回弹值。
政府鼓励出口的主要措施是()。
由于疏于______,院里的房屋大多十分陈旧,与旁边修建得簇新的正乙祠戏楼相比得多,不过在院中我们依稀还可以看到正乙祠当年的身影。填人划横线部分最恰当的一项是()。
2013年,重庆市房地产开发企业完成投资突破3000亿大关,达3012.78亿元,同比增长20.1%,较一季度回落5.2个百分点,比上半年回落7.6个百分点,比前三季度回落0.5个百分点。截至12月月底,全市商品房施工面积26251.89万平方米,同比增
世界上第一部成文宪法是1787年制定的()。
IntheefforttofireaCivilServiceemployee,hisorhermanagermayhavetospendup______$100,000oftaxmoneytodoso.
In data communication, data link is those parts of two data terminal equipments that are controlled by a protocol along with the
ThefirsttimeIheardtheactualLondonBridgewasinLakeHavasuCity,Arizona,Ithoughtitwasajoke.Astupidjokeatthat
最新回复
(
0
)