首页
登录
职称英语
[originaltext] Our topic today is about fleas that plague all of us who have
[originaltext] Our topic today is about fleas that plague all of us who have
游客
2023-08-29
14
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.
Questions:
29. According to the passage, in what way are fleas flexible in their diets?
30. According to the talk, what is resilin?
31. According to the speaker, which flea has been responsible for deaths?
32. According to the speaker, where did the Great Plague spread in the sixth century?
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 fatalplagues.(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/2967550.html
相关试题推荐
[originaltext]Thehomeisthecentralfocusofmostyoungpeople’slivesin
[originaltext]Thehomeisthecentralfocusofmostyoungpeople’slivesin
[originaltext]Hello,IamHarrietSmith.AstheeditorofTheVoice,I’dli
[originaltext]Hello,IamHarrietSmith.AstheeditorofTheVoice,I’dli
[originaltext]Objectsthatarevibratingmakesounds.Rhythmicsoundvibrati
[originaltext]M:You’regoingtoSoutheastAsiancountriesforaholidaysoon,
[originaltext]M:You’regoingtoSoutheastAsiancountriesforaholidaysoon,
[originaltext]M:Howisyourtermpapercomingalong?W:Ihavejustfinishedt
[originaltext]M:Howisyourtermpapercomingalong?W:Ihavejustfinishedt
[originaltext]Forcenturies,parrotshavebeenprizedpetsbecauseoftheir
随机试题
[originaltext]Teamsofteachersandschooladministratorsfromatleastfou
OneofthekeyfeaturesofCBIistheuseofauthentic"input"—inotherwords,"
Thespeakermainlydiscusses______.[originaltext]Culturecanbedefinedasbeh
SinceagiganticSainsburyismylocalcornershop,Ihaveapursefulofthos
[originaltext]Withtheuseofdriverlessvehiclesseeminglyinevitable,min
IthasbeenmonthssinceTinaMoorelastbitintoabagelorasliceoftoas
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性:
WhyHaveFormalDocuments Finally,w
孕妇,36岁,曾生育脊膜膨出患儿,本次妊娠8周,来院做产前检查该孕妇应重点排查胎
关于默示规则,即监理人未在收到承包人提交的工程量报表后的()天内完成审核的,视为
最新回复
(
0
)