首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
If you have ever wondered how an elephant smells, scientists have the answer. Researchers have discovered that African Elephants
If you have ever wondered how an elephant smells, scientists have the answer. Researchers have discovered that African Elephants
admin
2023-02-24
52
问题
If you have ever wondered how an elephant smells, scientists have the answer. Researchers have discovered that African Elephants have the largest number of genes【C1】________smell of any mammal. Given the size of their trunks, and how important it is【C2】________their survival, it is probably unsurprising that an elephant’s nose is not only the longest in the animal kingdom, but also the most effective.
In【C3】________, humans and other primates have a poor sense of smell. "The functions of these genes are not well known,【C4】________they are likely important for the living environment of African elephants," said author Dr Yoshihito Niimura of the University of Tokyo. "【C5】________, an elephant’s nose is not only long but also superior. " The sense of smell is【C6】________to all mammals, and they use it for【C7】________food, finding mates and locating their offspring.
In a study published in Genome Research, scientists【C8】________the 13 mammal species and found that African Elephants have twice the number of smell genes【C9】________dogs and five times more than humans. They have around 2,000 genes alone that are associated with scent. Humans in comparison have just under 400 and some other primates even【C10】________. The study found that 20,000 genes are【C11】________for the sense of smeD in mammals, of which around half are functional, but the collections【C12】________for each species. Horses have around 1,000 smell genes, rabbits around 750 and rats about 1,200.
"The large repertoire of elephant (smell) genes might be attributed to elephants’ heavy【C13】________on scent in various contexts, including social【C14】________and reproduction," added Dr Niimura. African and Asian elephants possess a【C15】________scent organ behind each eye, and male elephants can produce a special substance during annual mating, which is characterized【C16】________increased aggressiveness. And【C17】________studies have revealed that, African elephants can reportedly【C18】________between two Kenyan ethnic groups—the Maasai, whose young men【C19】________manhood by spearing elephants, and the Kamba, who are agricultural people that【C20】________little threat to elephants through smell.
【C7】
选项
A、resorting to
B、bursting into
C、coming across
D、sniffing out
答案
D
解析
本题考查动词短语作谓语,宾语为food,此处提到“所有的哺乳动物用嗅觉……食物,寻找配偶,以及找寻他们的子女”。可以看出,动物用嗅觉进行的各项日常活动,包括“寻找食物”,故选D项sniffing out“找寻”。A项resorting to“求助于”,带有消极之意,与后面并列的“找寻”的主动意义不相符。B项bursting into“突然做某事”,代入指大象突然找食物,不符合逻辑。C项come across“偶然碰到”,不符合嗅觉的特征。
转载请注明原文地址:https://kaotiyun.com/show/Z3MD777K
0
考研英语二
相关试题推荐
Scientistssentpatternsofelectricitycoursingacrosspeople’sbrains,coaxingtheirbrainstoseelettersthatweren’tthere.
Thinnerisn’talwaysbetter.Anumberofstudieshave【C1】________thatnormal-weightpeopleareinfactathigherriskofsomedi
Thinnerisn’talwaysbetter.Anumberofstudieshave【C1】________thatnormal-weightpeopleareinfactathigherriskofsomedi
Inanew【C1】________publishedinthejournalHeart,researchersfoundthatSwissadultswhotookoneortwodaytimenapsperwee
Inanew【C1】________publishedinthejournalHeart,researchersfoundthatSwissadultswhotookoneortwodaytimenapsperwee
Britain’sprivateschoolsareoneofitsmostsuccessfulexports.Thechildrenofthewealthy【C1】________tothem,whetherfromC
Britain’sprivateschoolsareoneofitsmostsuccessfulexports.Thechildrenofthewealthy【C1】________tothem,whetherfromC
Britain’sprivateschoolsareoneofitsmostsuccessfulexports.Thechildrenofthewealthy【C1】________tothem,whetherfromC
Britain’sprivateschoolsareoneofitsmostsuccessfulexports.Thechildrenofthewealthy【C1】________tothem,whetherfromC
Britain’sprivateschoolsareoneofitsmostsuccessfulexports.Thechildrenofthewealthy【C1】________tothem,whetherfromC
随机试题
下列对划线支票说法错误的是()
A.38.0~39.5℃B.37.5~39.0℃C.37.5~38.5℃D.37.5~39.5℃E.38.0~40.0℃羊的正常体温范围是
在龋病牙周病抽样调查中,为了增加样本的代表性,按什么分层是合适的
《血证论》提出的治血大法为通治血证大纲为
下列哪一项不是急性肾功能衰竭少尿期的水、电解质、酸碱平衡紊乱的临床表现
征收土地增值税和征用土地补偿的依据是()。
大气环境影响监测时,一级评价项目,监测点应包括评价范围内有代表性的环境空气保护目标,点位不少于()个。
下列实质性程序中,与查找未入账应付账款相关的有()。
(2017年真题)请围绕“有用的工具”为大班幼儿园设计主题活动,应包含三个子活动。要求:写出一个子活动的具体活动方案,包含活动的名称、目标、准备和主要环节。
Skype采用()网络拓扑。
最新回复
(
0
)