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
外语
What’s the main topic of the monologue?
What’s the main topic of the monologue?
admin
2016-06-25
29
问题
What’s the main topic of the monologue?
Today’s discussion is about a common animal reaction—the yawning. The dictionary defines a yawn as " an involuntary reaction to fatigue or boredom". That’s definitely true for human yawns but not necessarily for animal yawns. The same action, the yawn, can have quite different meanings in different species.
For instance, some animals yawn to intimidate intruders on their territory. Fish and lizards are examples of this. Hippos use yawns when they want to resolve a quarrel. Observers have seen two hippos yawn at each other for as long as two hours before they stop quarreling.
As for social animals like baboons or lions—they yawn to set up the pecking order within social groups,and lions often yawn to calm social tensions. Sometimes these animals yawn for a strictly physiological reason— that is to increase oxygen levels. And curiously enough, when they yawn for a physical reason like that, they do what men do—they try to stifle the yawn by looking away or by covering their mouths.
选项
A、When they are swimming.
B、When they are quarreling.
C、When they are socializing.
D、When they are eating.
答案
B
解析
转载请注明原文地址:https://jikaoti.com/ti/JBfsFFFM
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
MostmusiciansagreethatthebestviolinsweremadeinCremona,Italy,about200yearsago.Theseviolinssoundbetterthana
Accordingtogovernmentstatistics,menofallsocialclassesinBritainvisitpubsquiteoften,【21】______thekindofpubthe
Accordingtogovernmentstatistics,menofallsocialclassesinBritainvisitpubsquiteoften,【21】______thekindofpubthe
Accordingtogovernmentstatistics,menofallsocialclassesinBritainvisitpubsquiteoften,【21】______thekindofpubthe
In1637theFrenchmathematicianReneDescartespredictedthatitwouldneverbepossibletomakeamachinethatthinksashuman
Whyare"HowTo"booksingreatdemandintheUnitedStates?
Itisacuriousparadoxthatwethinkofthephysicalsciencesas"hard",thesocialsciencesas"soft",andthebiological
Thegovernmentistobanpaymentstowitnessesbynewspapersseekingtobuyuppeopleinvolvedinprominentcases【21】______
WhathappenedinLondonafewmonthsago?
A、Shelikesfolkmusicthemost.B、Shefeelsworriedwhilelisteningtofolkmusic.C、Sheoftenlistenstoinstrumentswhenshe
随机试题
以下药物一般不呈现“药源性胃肠道损伤”的是
患者,男,50岁,骤发剧烈腹痛,初起时剑突下偏右呈发作性胀痛,迅速波及全腹呈持续性,并向后腰背放射,伴恶心、呕吐,查体:体温38.9℃,BP110/80mmHg,脉搏110/min呼吸32/min心肺检查(-),全腹彭隆,伴明显肌紧张及广泛压痛,反跳痛
急性根尖周炎的患牙扪诊出现深部波动感的阶段是
由分部工程双代号网络计划如下图所示,则工作C的自由时差为()天。
上大学的收益不包括()。
我国古代很早就有把课内活动与课外活动结合起来的思想,下列选项中表达了这一思想的是()。
传统的动物资源保护措施主要是划定保护区或建立保种基地。这些措施能很好地保护物种的多样性,但也存在一些缺点:保护区面积大,偷猎现象屡禁不止;建立良种基地保护地方品种投资大,时间长,容易出现近亲繁殖、物种衰退等现象。试管、克隆、冷冻保存等生物技术新成果的问世,
给定材料材料1互联网技术的飞速发展,尤其是移动互联网技术的不断成熟,催生了一大批勇于表达自我、热衷传递信息的自媒体。微博、微信、手机程序的迅速崛起,促使信息生产、整合、传播方式发生了革命性变化,开启了信息传播的新模式。人人都有麦克风、摄
同卵双生子的大脑在遗传上是完全相同的。当一对同卵双生子中的一个人患上精神分裂症时,受感染的那个人的大脑中的某个区域比没有受感染的那个人的大脑中的相应区域小。当双胞胎中的两个人都没有精神分裂症时,两人就没有这样的差异。因此,这个发现为精神分裂症是由大脑的物质
如果公开课的课程没有得到教育部门的批准,那么高校不能开设;倘若公开课的课程没有受到学生的广泛欢迎,那么授课教师需要不断的反思自己,要么是课程设置得不合理,要么是授课风格不符合学生的口味;只有受到学生广泛欢迎的公开课才会得到教育部门的批准。某高校目前开设了公
最新回复
(
0
)