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
52
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:http://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
EnergyfromNaturalGas1.Muchoftheworldgetsitsene
Suetookontheextrawork______.A、onherdignityB、inhergoodgracesC、witha
Ithinkit’shightimewe_____strictmeasurestostoppollution.A、willtakeB、t
施工组织总设计中,施工部署需要对总体施工方案进行拟定,这些项目通常有( )。A.
学龄前儿童智力发育迅速,头颅增长超过下肢增长幅度。( )
前额两发角之间的骨度分寸(头维)是A.6寸 B.8寸 C.9寸 D.12寸
2010年4月,某审计组对丙公司2009年度财务收支情况进行了审计。有关固定资产
买卖合同区别于租赁合同、借用合同的特征是()。A.以转移财产使用权为目的 B
C类神经症剖面图的特点是量表1、2、3的T分均高于60分,并且()。
男孩,8岁,4周前曾患脓疱疹,3天来出现双眼水肿,尿少,肉眼血尿,血压150/1
最新回复
(
0
)