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
2024-09-23
42
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/3771403.html
相关试题推荐
Thefarmershavetakenstrenuouspainstoturnthe______landintofertilefiel
Thefarmerssuccessfully______someoftheriverwatertoirrigatetheircrops
Whatistheultimateaimofthestimuluspackage?[br][originaltext](29)B
Whatistheultimateaimofthestimuluspackage?[originaltext](29)Brazil’
Accordingtotheauthor,peopletendto______.[br][originaltext]Theways
Accordingtothepassage,seeingandperceivingare______.[br][originaltext]
WhyisthewomanlookingforsomebooksaboutEnglish?[br][originaltext]M:Hi
WhyisthewomanlookingforsomebooksaboutEnglish?[br][originaltext]M:Hi
WhyisthewomanlookingforsomebooksaboutEnglish?[originaltext]M:Hi!What
Whydoesthemanlooksotired?[br][originaltext]W:Howarethethingswithy
随机试题
Modemadvertisingmentrytojustifywhattheydobytellingusoftheadva
AnofficetoweronMillerStreetinManchesteriscompletelycoveredinsolar
Theriskofdepressionforpeoplewholivealoneisalmost80percenthigher
—正方形截面短粗立柱(见图a)),若将其低面加宽一倍(见图b)),原厚度不变,则
简述“尺规作图”的基本要求,并写出古希腊时期“几何作图三大问题”的具体内容。
属于胸苷酸合成酶抑制剂的是A.巯嘌呤 B.利妥昔单抗 C.羟基脲 D.氟尿
16、现场检修工作时,SV采样值网络与GOOSE网络可以联通。
《史记》体例有五:十二本纪,记帝王政迹,是编年的。十表,以分年略记世代为主。八书
从大量收购案例来看,防御性收购的最大受益者是股东,而不是公司经营者。()
关于母线安装的条件,正确的有()。A.建筑屋顶、楼板已施工完毕,且不得渗漏
最新回复
(
0
)