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
Why did the sugar cane farmers bring cane toads to Australia?
Why did the sugar cane farmers bring cane toads to Australia?
admin
2015-06-27
52
问题
Why did the sugar cane farmers bring cane toads to Australia?
Perhaps the most unusual animal ever brought to Australia was the cane toad. It is a large and ugly species of toad and was imported to this country by sugar cane farmers in 1935 [18B] to get rid of the beetles which killed the sugar cane plants.
The cane beetle is the natural enemy of the sugar cane plant. It lives in the cane and drops its eggs onto the ground around the base of the cane. The eggs develop into worms and then the worms eat the roots of the cane, resulting in the death of the plant. In the mid 30s there was a serious outbreak of cane beetles and the farmers became desperate to get rid of the pest which was ruining their livelihood.
Meanwhile it was reported that a toad, native to Central America, had been taken to Hawaii, where cane is also grown, and introduced with apparent success. So the Australian farmers arranged to import one hundred toads from Hawaii. The toads were then released into the cane fields to kill cane beetles.
As predicted, the toads started to breed successfully and within a very short time their numbers had swollen. But there was one serious problem. It turned out that [20A] cane toads did not eat cane beetles. And the reason for this is that toads live on insects that are found on the ground and the cane beetle lives at the top of the cane plant well out of reach of the toads. In fact they never come into contact with each other.
选项
A、Their houses were destroyed by cane beetles.
B、Cane beetles dropped their eggs onto the ground around the base of the plant.
C、Cane beetles killed all their livelihood.
D、Their sugar cane plants were ruined by overwhelming beetles.
答案
D
解析
文中提到,在30年代中期,蔗虫泛滥(there was a serious outbreak of the cane beetle),这让农夫们很绝望,因为它们毁掉了农夫们的营生(ruining their livelihood),即甘蔗,故答案为[D]。
转载请注明原文地址:https://kaotiyun.com/show/qPXK777K
0
专业英语四级
相关试题推荐
Australia’snewPrimeMinisterKevinRuddhasopposed
WhichofthefollowingdetailsisNOTtrue?
Writeanoteofabout50-60wordsbasedonthefollowingsituation:TheStudents’Unionistorecruitvolunteersforanexp
Theanswerswereso______thatitwasimpossibletobecompletelyunderstoodbythestudents.
NationalParkconservationiststhink_____concessionstandsspoilthenaturalbeautyofthepark.
Todoanythingyoulikeyouhavetosee______withyourmanager.
TheCommitteeregretsthatitcannotrightnow______yourgrouptotheirSociety.
Thevictimsofthebombingare______.
Gamblersareprobablythemost______peopleintheworldandtheywilldoanythingtoimprovetheirchancesofwinning.
随机试题
设f(x)=,则x2项的系数为________.
A、躯干、头皮、脸面和四肢B、躯干、四肢、头皮和脸面C、头皮、脸面、躯干和四肢D、耳后发际→面部→躯干→四肢→手掌足底E、头面→耳后→躯干→四肢末端→全身麻疹出疹的顺序是()
患者男性,19岁,大一学生。10天前急起精神异常,表现兴奋话多,诉脑子反应灵活,夸大自己的能力,说只要复习半个月就能通过GRE考试,将来要成为亿万富豪;疑心重,怀疑别人害他,背后讲他的坏话,不敢到外面吃饭,坚信有人会下毒。脾气大,有打骂家人的情况。夜晚睡眠
患者,男性,25岁,头部外伤、昏迷,急诊入院。病区接诊首先要做的护理工作是
孟先生是一个有工作成就的工程师助理,为了以后自己的生活更加的美好,想作一个理财规划,假如他是你的客户,经过初步沟通面谈后,获得了以下家庭、职业与财务信息,你将如何作出协助规划。一、案例成员四、保险情况孟先生只投保社会保险。五、理财目标1.购房计
软件生命周期可分为多个阶段,一般分为定义阶段、开发阶段和维护阶段。编码和测试属于______阶段。
Animal’s"SixthSense"AtsunamiwastriggeredbyanearthquakeintheIndianOceaninDecember,2004.Itkilledtensoftho
Well,nogainwithoutpain,theysay.Butwhataboutpainwithoutgain?EverywhereyougoinAmerica,youheartalesofcorporat
【S1】【S5】
A、Therearefewhonestpeople.B、Ittakesalongtimetofindhonestfriends.C、Peoplewon’tbehonestuntiltheyknowyou.D、It
最新回复
(
0
)