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
专升本
All whales fall into two groups, those with teeth and those without. Both beluga and dolphin belong to the suborder of toothed w
All whales fall into two groups, those with teeth and those without. Both beluga and dolphin belong to the suborder of toothed w
admin
2011-04-26
27
问题
All whales fall into two groups, those with teeth and those without. Both beluga and dolphin belong to the suborder of toothed whales known as Odontoceti, along with porpoises, narwhals, pilot whales, killer whales and the largest toothed creature in the world, the sperm whale. Size differences among the Odontoceti are remarkable. A common porpoise will run only 4 or 5 feet in length and 300 pounds in weight; a sperm whale may be 10 times as long and 300 times as heavy. The beluga falls in between, weighing up to 2,000 pounds. And it does chirp. In fact, it makes a great variety of squeaking, whistling, and clicking sounds, which have earned it the name of sea canary.
The toothless, or baleen, whales belong to the suborder of Mysticeti. This is a group of generally large whales, formerly abundant in all the oceans of the world. Though reduced by hunting, most species are still found along the coasts of the United Stated and Canada. All but two of the Mysticeti reach 40 feet or more at maturity, with the blue whale running up to 100 feet and tipping the scales at up to 130 tons. This whale is by far the largest creature that has ever lived on earth, 4 times the weight of the largest dinosaur, 30 times that of an elephant.
With what topic is the passage mainly concerned?
选项
A、Breeding habits of whales.
B、Differences between whales.
C、Efforts to preserve whales.
D、The intelligence of whales.
答案
B
解析
本题为主题题。文章首句即向我们介绍了鲸分为两大类,接着运用了举数字、比较与对比的方法分别介绍了两类鲸的情况。文章的脉络很清楚,就是向我们介绍两类鲸,因此选B。
转载请注明原文地址:https://kaotiyun.com/show/VNqC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Manypeoplefindhomegardening______.Fromthepassagewecanconcludethat______.
WhataresomeoftheproblemsthatChromiumⅥcancause?WhydoesDr.SterngoldthinkthattheRemcochrome-platingplantwasr
The______objectiveofthisadulteducationprojectistoexploittheemployees’potentialtothefull.
YouarerequiredtowriteacompositiononthefollowingtopicMyOpinionofToday’sEducationinthreeparagraphswithin30min
Imaginetakingadustbathtokeepclean!Sparrowshavetobatheindusttokeeppestsoutoftheirfeathers.Tinybugssuchas
Pleasegivemybest______toyourfamily.
Inthelate1860’s,industryinAmericagrewrapidly.Morefactoriesmeantmorejobs.Butworkingconditionsweredangerous.Emp
Britainhasthehighest______ofroadtrafficintheworld—over60carsforeverymileofroad.
Exercise,everyoneadvises!Butimmediately,whenyoutry,yourunintotrouble.Thereissomuchcontradictory,sometimesincor
Allwhalesfallintotwogroups,thosewithteethandthosewithout.Bothbelugaanddolphinbelongtothesuborderoftoothedw
随机试题
《海关法》规定,关税减免包括
通常顶级域名由三个字母组成,mil表示_________部门。
假定你是一名中国学生,名叫李华,参加了学校组织的赴英国际交流活动。目前,你居住在英国朋友Sue的家里。请你用英语给你在上海外国语学院教书的父亲发一封电子邮件,内容如下:1.你对这次活动的感受。2.你居住在英国朋友家的情况。3.天
真细胞DNA前导链合成的主要复制酶是
被告人付某,被第一审人民法院以盗窃罪判处有期徒刑3年。在第一审判决书送达给付某后,如果付某不服而想提出上诉,则下述说法中正确的是:
【设计条件】在一自然坡地拟建一条11.6m宽的道路,场地地形如图4-3-4(a)所示。A点的设计标高为63.00m。【任务要求】.从63.00m标高开始,画出等高距为0.30m的拟建道路的设计等高线,并标注相关尺寸。.在道路
为防止水流下渗和冲刷,截水沟应进行严密的防渗和加固的地段有()。
第六产业就是通过鼓励农户搞多种经营,即不仅种植农作物,而且从事农产品加工与销售农产品及其加工产品,以获得更多的增值价值。第六产业的实质是:
黑格尔说:“真理是在漫长地发展着的认识过程中被掌握的,在这一过程中,每一步都是它前一步的直接继续。”这说明真理()
Howmenfirstlearnttoinventwordsisunknown;inotherwords,theoriginoflanguageisamystery.Allwereallyknowisthat
最新回复
(
0
)