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
2023-09-08
50
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、From Europe to China.
B、From Ethiopia to Europe.
C、From China to Ethiopia.
D、From Byzantium to China.
答案
B
解析
细节题。根据文中提到的the Great Plague of Europe in 500 A D that spread from Ethiopia to Byzantium to Europe.(公元500年,欧洲爆发了黑死病,先从Ethiopia蔓延到Byzantium乃至整个 Europe。)可以得知本题答案,选项B符合题意。
转载请注明原文地址:http://tihaiku.com/zcyy/2995950.html
相关试题推荐
[originaltext]Thankyouforcomingtothismeetingforstudentswhowillbe
[originaltext]Thankyouforcomingtothismeetingforstudentswhowillbe
[originaltext]M:It’ssocoldnow,butthismorningitwassohotandsunny.I
[originaltext]M:Lookatthosecolorfulbirdsoverthere.Ithinkyoucanteach
[originaltext]M:Lookatthosecolorfulbirdsoverthere.Ithinkyoucanteach
[originaltext]M:Lookatthosecolorfulbirdsoverthere.Ithinkyoucanteach
[originaltext]Let’sperceivetothemainexhibithallandlookatsomeoft
[originaltext]Let’sperceivetothemainexhibithallandlookatsomeoft
[originaltext]Let’sperceivetothemainexhibithallandlookatsomeoft
[originaltext]Goodevening.YouarelisteningtoPopWorldofBCDInternati
随机试题
[originaltext]Withthedevelopmentofscienceandtechnology,healthcaretoday
Whoarethetwosidesofthehostilitiesaccordingtothenews?[originaltext]
Marywasinalatherwhensheheardthatshewouldbetransferredtoanotherdep
Inafamilywheretherolesofmenandwomenarenotsharplyseparatedandw
2004年4月30日,乌海市某煤矿发生一起特大透水事故,造成13人死亡、2人失踪
A.λ=5,μ=1 B.λ=1,μ=5 C.λ=-5,μ=1 D.λ=-1
按糖的种类和苷元连接方式可将强心苷分()类型。A.2种B.3种C.4种D.5种
()所使用的关税和配额是最明显的壁垒。A:关税升级 B:通关环节壁垒 C:
基金管理公司股东的实际控制人发生变化的,该股东应在()个工作日内报告中国证监会。
班主任在班级管理体制中的领导影响力主要表现在两个方面:一是职权影响力:二是()
最新回复
(
0
)