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
Humanity is a new experiment on planet Earth. For most of its history, life on Earth was restricted to the sea. Living things be
Humanity is a new experiment on planet Earth. For most of its history, life on Earth was restricted to the sea. Living things be
admin
2008-12-30
54
问题
Humanity is a new experiment on planet Earth. For most of its history, life on Earth was restricted to the sea. Living things began to populate the land slightly over 400 million years ago. And humans have existed for no more than 3 million years.
One way to represent the evolution of life is to compress the 4. 6-billion-year history of Earth into a 1-year-long film. In such a film, Earth forms as the film begins on January 1, and through all of January and February it cools and is cratered(变成坑状) and the first oceans form.
But those oceans remain lifeless until sometime in March or early April, when the first living things develop
. The 4-billion-year history of Precambrian (前寒武纪) evolution lasts until the film reaches mid-November, when primitive ocean life begins to evolve into complex organisms such as trilobites(三叶虫).
If we examine the land instead of the oceans, we find a lifeless waste. But once our film shows plant and animal life on the land, about November 28, evolution proceeds rapidly. Dinosaurs, for example, appear on about December 12 and vanish by Christmas Eve, as mammals (哺乳动物) and birds flourish.
Throughout the 1 -year-run of our film there are no humans, and even during the last days of the year as the mammals rise and dominate the landscape, there are no people. On the early evening of December 31, vaguely human forms move through the grasslands, and by late evening they begin making stone tools. The Stone Age lasts until about 11:45 p. m. , and the first signs of civilization, towns and cities, do not appear until 11:54 p. m. The Christian era begins only 14 seconds before the New Year, and the Declaration of Independence is signed with one second to spare.
It is indicated in the passage that______.
选项
A、Earth is cool at first
B、Earth is hot at the beginning
C、there are oceans at the beginning
D、there is life in the ocean in late February
答案
B
解析
第二段第二句“…through all of January and February it cools”,地球冷却下来说明地球最初是热的;C项是错误的,因为文中提到到了二月份的时候才出现了海洋;D项是错误的,因为海洋生物的出现是到三月和四月初。
转载请注明原文地址:https://kaotiyun.com/show/kjLC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
计算二重积分,其中D为由曲线与直线y=x及直线y=2所围成的平面闭区域.
Thefallinthenumberofdeathsfromheartdiseaseisgenerally______improvementsindiet.
Historianscan’ttelluswhen,whereor【71】thefirstfoodwascooked.Inearliest【72】whenpeoplehadeatentheirfood【73】,
Otherexperimentshaveshown【61】thebrainneedstimeto"digest"【62】hasbeenlearned.Thetimenecessary【63】thisis5to1
It’sstillearlyinthemorning.Thereisn’t______intheoffice.
A、feelingpainispartofourlifeB、painshouldbeavoidedatallcostsC、feelingpaincanbeaninterestingthingD、magicpowe
A、Ifitcontinueslikethis,weshalldestroyourselves.B、Itisnecessarytoconserveournature.C、1970wasWorldConservation
Thevitaminsnecessaryforahealthybodyarenormallysuppliedbya______offruitandgreenvegetables.
MostAmericansdon’tliketogetadvicefrommembersoftheirfamily.Whentheyneedadvice,theydon’tusually【61】peoplethey
Asamediumofexchange,moneypermitstheseparationofexchangeintothetwodistinctactsofbuyingandselling,withoutrequ
随机试题
下列关于或有事项的说法中,错误的是()。
根据材料内部联系,经过领会,揭示事物意义的识记是()。
Thereisonethingthateveryonewantsmorethananythingelse.Somepeopletrytogetitbymakingmoney.Theythinkthatwhen
常引起眦部睑缘炎的致病菌为
女性,27岁,因左侧甲状腺肿物行左侧甲状腺全切手术,术中冷冻病理切片结果为“甲状腺乳头状腺癌”,此时最适宜的处理是
代谢物主要是两个苯环的氧化代谢物主要是酯水解和N-去甲基化
钢筋混凝土井塔一般采用的施工方法是()。
在计算预应力筋下料长度时,应考虑的因素有()。
下列各项中,应计入营业外支出的有()。
喜新厌旧是一种普遍的人类情感。为了迎合人们_________的心理诉求,大胆启用年轻人、新面孔,成为冯氏春晚的一大亮点,以至于让冯小刚“在春晚团队里借不到花镜”。其实,春晚不仅是为人们营造春节欢乐氛围的娱乐盛宴,更是引领和提升人们鉴赏能力的文化载体。春晚优
最新回复
(
0
)