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 au-tumn, which follows summer, which follows spr
Most of-us are used to seasons. Each year, spring follows winter, which follows au-tumn, which follows summer, which follows spr
admin
2011-01-14
65
问题
Most of-us are used to seasons. Each year, spring follows winter, which follows au-tumn, 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 ei-ther 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 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 (洋流) 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 help their research work
答案
C
解析
推理判断题。根据第四段最后两句Studies suggest that melting just in the Southern hemisphere would have been impossible,too.The only reasonable conclu-sion…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/H8JO777K
0
成人本科学位英语
相关试题推荐
Asamediumofexchange,moneypermitstheseparationofexchangeintothetwodistinctactsofbuyingandselling,withoutrequ
Americaisthelandoftheautomobile.Thiscountryhasonly6percentoftheworld’spopulationoutof46percentoftheworld’
Americaisthelandoftheautomobile.Thiscountryhasonly6percentoftheworld’spopulationoutof46percentoftheworld’
IntheUnitedStates,itisnotcustomarytotelephonesomeoneveryearlyinthemorning.Ifyoutelephonehimearlyintheday,
Whatdoesascientistdowhenheorshe"explains"something?Scientificexplanationcomesintwoforms;generalizationandredu
Insomeways,theUnitedStateshasmadespectacularprogress.Firesnolongerdestroy18000buildingsastheydidintheGreat
Forsometimepastithasbeenwidelyacceptedthatbabies—andothercreatures—learntodothingsbecausecertainactsleadto"
Advanceinfoodpreservationgaveconsumersindevelopedcountriesaccessto______allfoodsgrownindistantlands.
Encouragementthroughpraiseisthemosteffectivemethodofgettingpeople______theirbest.
这个问题可以在下次会议上讨论。
随机试题
在修建性详细规划中,安排基础设施规划的内容包括__________、__________、__________、__________、__________。
既善收敛止血,又可补虚止痢的药为
急性病毒性心肌炎最常见的病原体是
男性患者,48岁,教授。因反复心前区疼痛1年,加重伴呼吸困难2小时入院。入院前1年常感心前区压迫性疼痛,多于劳累、饭后发作,每次持续3~5分钟,休息后减轻。入院前半月,疼痛渐频繁,休息时也发作。入院前2小时突感心前区压榨样疼痛,并向左肩部、臂部放射,伴大汗
属于配伍禁忌,斗谱排列时不能装于一斗及上、下斗的饮片是
对季节性冻土与多年冻土季节融化层采取原状土样或扰动土样的间隔应为()。
建设工程项目信息分类的两种基本方法是()。
下列计量单位中,既适合工程量清单项目又适合基础定额项目的是()。
尹某因涉嫌犯罪现被监视居住,则下列选项中,一定不能成为监视居住执行场所的是()。
Therelationshipbetweencorpulenceanddiseaseremaincontroversial,althoughstatisticsclearlyassociateareducedlifeexpec
最新回复
(
0
)