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
Most of us are used to seasons. Each year, spring follows winter, which follows autumn, which follows summer, which follows spri
Most of us are used to seasons. Each year, spring follows winter, which follows autumn, which follows summer, which follows spri
admin
2014-07-25
36
问题
Most of us are used to seasons. Each year, spring follows winter, which follows autumn, which follows summer, which follows spring. And winter is colder than summer. But the earth goes through temperature cycles over much longer periods than those that we experience. Between 65,000 and 35,000 years ago, the planet was much colder than it is now. During that time the temperature also changed a lot, with periods of warming and cooling. Ice melted during the warm periods, which made sea levels rise. Water froze again during the cold periods.
A new study from Switzerland sheds light on where ice sheets melted during the ice age. It now seems that the ice melted at both ends of the earth, rather than just in either northern or southern regions.
This surprised the researchers from the University of Bern. Scientists have long assumed that most of the ice that melted was in the Northern hemisphere(半球)during the 30,000-year long ice age. That belief was held because the North Pole is surrounded by land, while the South Pole is surrounded by the Antarctic Ocean. It is easier for ice sheets to grow on land. If surrounded by sea the ice can easily just slip into the ocean instead of building up.
The researchers used a computer model to look at ways the ice could melt and how it might affect sea levels. They compared these results to evidence of how temperatures and currents(洋流)actually changed during that time. The model showed that if it was only in the Northern hemisphere that ice melted, there would have been a bigger impact(影响)on ocean currents and sea temperatures than what actually happened. Studies suggest that melting just in the Southern hemisphere would have been impossible, too. The only reasonable conclusion, the scientists could make, was that ice melted equally in the North and the South.
It is still a mystery as to what caused the temperature changes that caused the ice to melt.
We can infer from the passage______.
选项
A、the ice can easily just slip into the ocean
B、volcanoes caused the ice to melt
C、melting just in the Northern hemisphere would have been impossible
D、researchers often use the computer models to help their research work
答案
C
解析
推理判断题。根据定位句可知,冰川既不可能只在南半球融化,也不可能只在北半球融化。故答案为C。
转载请注明原文地址:https://kaotiyun.com/show/02xO777K
0
成人本科学位英语
相关试题推荐
Mr.Andersonusedto(jogging)inthe(earlymorning)air(during)(thewintermonths),butnowhehasstopped.
TheOlympicGamesareheld______.Whichofthefollowingisdiscussedinthepassage?
Youaresayingthateveryoneshouldbeequal,andthisis______Idisagree.
Inregardtotheproductionofgoodsingreaterquantities,theauthorstatesthat______.Improvedqualityoffacialtissuesr
Mrs.Whitemademe______theworkagain.
IfsomeoneisintheUnitedStatesforgood,itmeansheisthere______.
TheAmericansandtheBritishnotonlyspeakthesamelanguagebutalsosharealargenumberofsocialcustoms.
Doctorssayangercanbeanextremelydamagingemotionunlessyoulearnhowtodealwithit.Theywarnthatangryhostilefeelin
TheChinesehaveusedamethodcalledacupuncture(针灸)toperformoperationsforabout4,000yearswithoutputtingthepatientt
Wealthypeople,however,couldaffordtotraveltosunnycountries.
随机试题
在新抹砂浆、现浇混凝土面层涂饰建筑涂料,常温要求的时间分别是()d以上。
脐带中的脐动脉有几根
患者女,35岁,胃大部切除术后切口化脓,创面脓液量多,有臭味,此时应选用()
“用最严谨的标准、最严格的监管、最严厉的处罚、最严肃的问责,确保广大人民群众‘舌尖上的安全’”。不久前闭幕的中央农村工作会议,把食品安全放在更加重要的位置来谋划,四个“最”__________,一个“确保”__________。这样的宣示与承诺,对农产品生
票据基础关系也称为非票据关系。下列各项属于票据基础关系的是:()
某上市公司拟在1年内购买重大资产,所需资金比例占公司资产总额的45%,此项决议需经出席会议的股东所持表决权的()以上通过。
古代希腊的民主制度,主要是以雅典为代表建立和发展起来的。根据亚里士多德在《雅典政制》中的记载,雅典原来也是贵族当政,按照门第和财富选任执政官,后来经过多次改革,民主政治才逐渐完善起来。 这段文字直接支持了这样一个观点,即()。
给定资料1.2011年2月17日,网络上出现了一篇名为《内地“皮革奶粉”死灰复燃长期食用可致癌》的文章。文章说,销声匿迹数年后,内地再现“皮革奶粉”踪影,内地疑有不良商人竟将皮革废料的动物毛发等物质加以水解,再将产生出来的粉状物掺入奶粉中,意图提高奶类的
与下面例句语法结构相同的一项是()。例:他的报告能使听讲的学生了解课本以外的新知识。
TheAmericanfarmershavealwaysbeenindependentandhard-working.Intheeighteenthcenturyfannerswerequiteself-sufficien
最新回复
(
0
)