首页
登录
职称英语
[originaltext] Our topic today is about fleas that plague all of us who hav
[originaltext] Our topic today is about fleas that plague all of us who hav
游客
2024-05-30
25
管理
问题
Our topic today is about fleas that plague all of us who have cats and dogs in our homes. You may be surprised to find out that there are about 1,500 species of fleas, and that each species has its own preferred host. Fleas are, in fact, quite adept at finding their hosts. In an experiment, 270 fleas from rabbits were marked and then let loose in a large meadow. After a few days, a full half of the fleas had found rabbits to live on. Fleas also have a very interesting flexible diet. They can go for many months without eating if they have to, and they will change hosts in order to get more food, even if they don’t like the taste of their new host as much as the old! Their jumping ability is incredible, too. You may know this from your own experience. Some fleas can jump as high as 13 inches, which is quite a lot for such a small creature. This jumping ability comes from their relatively large muscular legs that are equipped with resilin, a kind of natural rubber. The elastic properties of this resilin have not yet been equaled in any artificial substance. Though the fleas on your cat or dog are not dangerous to you, some fleas carry diseases. It is the rat flea that is responsible for carrying some fatal plagues. These fleas have been in part responsible for the Great Plague of Europe in 500 A.D. that spread from Ethiopia to Byzantium to Europe. They are also part of the cause of Black Death in China and Europe.
选项
A、Rat flea.
B、Cat flea.
C、Dog flea.
D、Rabbit flea.
答案
A
解析
细节题。fatal意为“致命的”,文中提到的It is the rat flea that is responsible for carrying some fatal plagues.(是老鼠身上的跳蚤带来了黑死病。)表明rat flea可以导致死亡,选项A正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3612215.html
相关试题推荐
[originaltext]Asaresultofrisinguniversitycosts,manystudentsarefi
[originaltext]W:IheardyoujustgotbackfromaweekendtriptoSantaFe.Ih
[originaltext]W:Well,howareyoudoing?M:Fine.Thecomputersectioniscomi
[originaltext]W:Don’tyouthinkit’smarvelousthatMaryhaswonthefirstpri
[originaltext]W:Don’tyouthinkit’smarvelousthatMaryhaswonthefirstpri
[originaltext]W:Don’tyouthinkit’smarvelousthatMaryhaswonthefirstpri
[originaltext]W:Don’tyouthinkit’smarvelousthatMaryhaswonthefirstpri
[originaltext]W:Don’tyouthinkit’smarvelousthatMaryhaswonthefirstpri
[originaltext]W:Don’tyouthinkit’smarvelousthatMaryhaswonthefirstpri
[originaltext]Toooftenyoungpeoplegetthemselvesemployedquitebyacci
随机试题
Educationofexceptionalchildrenmeansprovisionofspecialeducationalserv
MillionsofAmericanslieawakeatnightcountingsheep,orhaveastiffdri
Nooneknowshowmanlearnedtomakewords.Perhapshebeganbymakingsound
脊髓损伤急性期康复治疗目的,下列正确的是( )。A.防止卧床并发症,对残存肌力
CR经X线照射后在影像板存留的是A.模拟影像 B.数字影像 C.黑白影像
某检察院接到举报:A工程公司供销科科长张某在外购买高档房,与其收入明显不符。调查
教育实验研究历史发展的两条基本线索是什么?
张某故意杀死范某,某县公安机关侦查终结后移送某县人民检察院,某县人民检察院将案件
一般而言,存货周转速度越快,存货占用水平越低,企业的营运能力就越强。()
下列关于建设工程设计合同当事人的说法,正确的是( )A.发包人只能是建设单位
最新回复
(
0
)