首页
登录
职称英语
Why did the sugar cane farmers bring cane toads to Australia? [br] [originaltex
Why did the sugar cane farmers bring cane toads to Australia? [br] [originaltex
游客
2023-11-04
28
管理
问题
Why did the sugar cane farmers bring cane toads to Australia? [br]
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://tihaiku.com/zcyy/3156835.html
相关试题推荐
Whatistheeventualeffectofthebehaviorofthebank?[originaltext]Finan
Nigeria’sNationalSecurityAdviserhasbeenfiredbecause[br][originaltext]
Nigeria’sNationalSecurityAdviserhasbeenfiredbecause[originaltext]Nig
Sevenpeoplewerearrestedbecause[originaltext]PoliceintheIrishRepubli
______senatorsvoteforthebill.[originaltext]TheUnitedStatesSenateha
Theproposalisaimingat[br][originaltext]VotersinSwitzerlandhaverej
JohnWilliams’houseismadeof[br][originaltext]Morethan40yearsago,
Whatdoesatrainingspecificationspecify?[br][originaltext]Asweknow,
Whatdoesatrainingspecificationspecify?[br][originaltext]Asweknow,
Whatdoesatrainingspecificationspecify?[originaltext]Asweknow,itis
随机试题
Wherewechoosetolivecanhaveahugeimpactonourlives.Livinginanun
ThefamilyisthecenterofmosttraditionalAsians’lives.Manypeopleworr
Iwish____________________(我今天上午不能待在家里),butIhadtogoforaninterview.Ico
我国出版事业必须坚持的方向是( )。A.让读者的任何需求都能得到满足 B.让
引起植物黄化现象的最主要因子是A.温度 B.光 C.风 D.空气
根据我国现行《宪法》第37条之规定,下列选项中作为公民具有不受逮捕的权利的条件是
3月份,大豆现货的价格为650美分/蒲式耳。某经销商需要在6月份购买大豆,为防止
关于栓塞的叙述,哪项是正确的?A.进入血液的癌细胞均可形成转移灶 B.脂肪栓塞
(2016年真题)张某对当地镇政府干部王某的工作提出激烈批评,引起群众热议,被公
对一些招标文件,如果发现工程范围不很明确,条款不清楚或很不公正,或技术规范要求过
最新回复
(
0
)