首页
登录
职称英语
The climate of earth has fluctuated quite a bit over the last 4.6 billion ye
The climate of earth has fluctuated quite a bit over the last 4.6 billion ye
游客
2023-08-31
59
管理
问题
The climate of earth has fluctuated quite a bit over the last 4.6 billion years of our planet’s history and it can be expected that the climate will continue to change. One of the most intriguing questions in earth science is whether the periods of ice ages are over or arc we living in an "interglacial" period of time between ice ages?
The geologic time period we are now living in is known as the Holocene (全新世). This epoch began about 11,000 years ago which was the end of the last glacial period and the end of the Pleistocene (更新世) epoch. The Pleistocene was an epoch of cool glacial and warmer interglacial periods which began about 1.8 million years ago.
Since the glacial period known as the "Wisconsin" in North America and "Wrm’ in Europe when over 10 million square miles (about 27 million km2 ) of North America, Asia, and Europe were covered by ice, almost all of the ice sheets covering the land and glaciers in the mountains have retreated. Today, about ten percent of the earth’s surface is covered by ice; 96% of this ice is located in Antarctica and Greenland. Glacial ice is also present in such diverse places as Alaska, Canada, New Zealand, Asia, and California.
As only 11,000 years has passed since the last Ice Age, scientists can not be certain that we are indeed living in a post- glacial Holocene epoch instead of an interglacial period of the Pleistocene and thus due for another ice age in the geologic future. Some scientists believe that an increase in global temperature, as we are now experiencing, could be a sign of an impending ice age and could actually increase the amount of ice on the earth’s surface.
The cold, dry air above the Arctic and Antarctica carries little moisture and drops little snow on the regions. An increase in global temperature could increase the mount of moisture in the air and increase the amount of snowfall. After years of more snowfall than melting, the Polar Regions could accumulate more ice.
An accumulation of ice would lead to a lowering of the level of the oceans and there would be further, unanticipated changes in the global climate system as well. Our short history on earth and our shorter record of the climate keeps us from fully understanding the implications of global warming. Without a doubt, an increase in the earth’s temperature will have major consequences for all life on this planet. [br] What’s the result of an accumulation of ice?
选项
A、An accumulation of ice would make the global climate system altered.
B、An accumulation of ice would make snow more difficult to melt.
C、An accumulation of ice would increase the amount of moisture in the air.
D、An accumulation of ice would increase the global temperature.
答案
A
解析
细节题。由文章第六段第一句可知,冰的堆积可能改变全球气候系统,所以A正确。
转载请注明原文地址:https://tihaiku.com/zcyy/2973193.html
相关试题推荐
Theclimateofearthhasfluctuatedquiteabitoverthelast4.6billionye
Theclimateofearthhasfluctuatedquiteabitoverthelast4.6billionye
Theshortergrowingseasonsexpectedwithclimatechangeoverthenext40ye
Theshortergrowingseasonsexpectedwithclimatechangeoverthenext40ye
Theshortergrowingseasonsexpectedwithclimatechangeoverthenext40ye
Theshortergrowingseasonsexpectedwithclimatechangeoverthenext40ye
Theshortergrowingseasonsexpectedwithclimatechangeoverthenext40ye
Theshortergrowingseasonsexpectedwithclimatechangeoverthenext40ye
Theshortergrowingseasonsexpectedwithclimatechangeoverthenext40ye
Theshortergrowingseasonsexpectedwithclimatechangeoverthenext40ye
随机试题
cleaningupThecurrentrowoverclimatechange
Forthispart,youareallowed30minutestowriteashortessayentitledHow
Hedidn’tpayclose______tothedetails.A、attractionB、attentionC、careD、conf
(2020年真题)下列股利政策中,会导致股利支付与盈余相脱节,且当盈余较低时可能
带有绒毛类药入汤剂宜A.包煎B.先煎C.后下D.另煎E.冲服
A.渗滤法 B.冷浸法 C.回流提取法 D.连续回流提取法 E.水蒸气蒸
换流变压器高压试验前应通知阀厅内高压穿墙套管侧试验无关人员撤离,并派专人(___
在票面利率的基础上参照预先确定的某一基准利率予以定期调整的债券指的是()。A:零
利用MACD进行价格分析时,正确的认识是()。A:出现一次底背离即可以确认价
下面有关配电装置配置的表述中哪几项是正确的?()A.66~110kV敞开式配电
最新回复
(
0
)