首页
登录
职称英语
Here in the United States, before agricultural activities destroyed the nat
Here in the United States, before agricultural activities destroyed the nat
游客
2024-11-12
3
管理
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. [br] 【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://tihaiku.com/zcyy/3842738.html
相关试题推荐
NotwomanheldapresidentialcabinetpositionintheUnitedStatesuntil1933,
DuringtheColonialdays,theIroquoishadanagriculturaleconomybasingmainly
OneofthewildestandmostinaccessiblepartsoftheUnitedStatesaretheEver
MembershipinlaborunionsintheUnitedStatesreacheditspeakof17millions
EvenmanyearlyleadersoftheUnitedStateshaveprovidednamesfortowns,only
Weeachhastohandinapaperonthetopicofenvironmentbeforetheendofthi
[originaltext]W:Tellusabitmoreabouttheseextra-curricularactivitiesof
ReadingTipsI.Three【T1】______phasesofreading【T1】______—beforereading—
ReadingTipsI.Three【T1】______phasesofreading【T1】______—beforereading—
ReadingTipsI.Three【T1】______phasesofreading【T1】______—beforereading—
随机试题
Controlofmarketshareisthekeyissueinthiscasestudy.Thesituationi
ChoosingaForeignLanguagetoStudyItisnoteasytochooseaforeignlanguage
CAPCompanyCAPCompany,af
Icouldhavecalledyouyesterday,butI_____yourtelephonenumber.A、didn’tha
外源性凝血系统最常用的筛选试验是A.纤维蛋白原测定 B.APTT C.TT
知识岗位与工业岗位之间存在极大的不同,因为想象力的迸发需要时间,知识型的工作者在
公司盈利预测的假设有()。 ①销售收入预测 ②管理和销售费用预测 ③生产
A.竞争法测体B.双抗体夹心法测抗原C.捕获法D.竞争法测抗原E.间接法以下示意
短时记忆的容量有限,大约为()个组块。A.5士2 B.6士2 C.7土
2008年11月单项选择题 共情对于咨询活动而言,最重要的意义在于()。
最新回复
(
0
)