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
2024-11-16
24
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/3848611.html
相关试题推荐
EvenmanyearlyleadersoftheUnitedStateshaveprovidednamesfortowns,only
Oneoutofeverytenpersonsinthe1978UnitedStateslaborforcewasateenage
Weeachhastohandinapaperonthetopicofenvironmentbeforetheendofthi
TheUnitedStatesConstitutionrequiresthatthePresidentbeanatural-borncit
DuringtheColonialdays,theIroquoishadanagriculturaleconomybasingmainly
EvenbeforethehumanorganismdevelopedintotheirpresentstageofHomosapien
NewresearchfromtheUnitedStatessuggeststhatthemillennia-oldtherapy
NewresearchfromtheUnitedStatessuggeststhatthemillennia-oldtherapy
NewresearchfromtheUnitedStatessuggeststhatthemillennia-oldtherapy
NewresearchfromtheUnitedStatessuggeststhatthemillennia-oldtherapy
随机试题
Labelthemapbelow.Writethecorrectletter,A-l,nexttoQuestions14-20.[im
Thinnerisn’talwaysbetter.Anumberofstudieshaveconcludedthatnormal-
[originaltext]Aworld-championbodybuilderhasnomoremusclesthandoesa
ItoldmyfriendGrahamthatIoftencyclethetwomilesfrommyhousetot
42.5R为早强型水泥,其特点是()强度较42.5普通型水泥高。A.3d B
宏观调控法的调整方法中,强行控制方法的施行主体是( )。A.政府或其授权的机关
关于组织结构特征因素之中的管理层次的说法,错误的是()。A.管理层次也称组织层次
某公司购置一辆不含增值税价格为16万元的国产车自用,购置时因符合免税条件而未缴纳
(2020年真题)甲筷子厂为增值税一般纳税人,2019年12月销售自产竹制筷子取
下列建设工程项目进度控制的措施中,属于经济措施的是()。A.重视信息技术在进度
最新回复
(
0
)