首页
登录
职称英语
Alaska is disappearing slowly but surely. Since the 1950s, it is estimated t
Alaska is disappearing slowly but surely. Since the 1950s, it is estimated t
游客
2024-08-20
9
管理
问题
Alaska is disappearing slowly but surely. Since the 1950s, it is estimated that as much as 15 percent of Alaska’s area has disappeared. But how can a whole state be disappearing?
One reason for Alaska’s gradual disappearance is the melting of its glaciers. According to one geologist at the US Geological Survey, about 98% of Alaska’s glaciers are either unmoving or diminishing. This diminishing seems mainly due to the increase in global temperatures. Since the 1960s, the average year—round temperature has increased by 5°F. Additionally, the average winter temperature has increased by 8°F. Presently, an estimated 24 cubic miles of ice is disappearing from Alaskan glaciers every year. It may be even more in the near future, as some scientists predict that the average world temperature could go up 2. 5 to 10 °F by the year 2100.
Another problem contributing to Alaska’s gradual disappearance is its melting permafrost. Much of the land in Alaska was permanently frozen, or frozen for most of the year. This maintained its stability. Now, the melting permafrost is causing a number of problems on land. Roads and utility poles are collapsing. Also, the hard permafrost, which originally prevented beaches from eroding during violent storms is now melting. Affected villages are forced to move somewhere else. For villages on small low islands, one terrible storm could wipe out the entire community.
Some scientists believe that human activity is linked to the global increase in weather temperature. Whether the rising temperatures are caused by human activity or natural changes, the fact remains that Alaska is warming. Sadly, this could be a preview of what will happen to the rest of the world in the next century.
Summary:
There is a big problem in Alaska. The【49】______are melting. Scientists【50】______that 15 percent of Alaska has already melted. They say this change is the result of【51】______in the Earth’s【52】______. The higher temperatures are【53】______several problems in Alaska. The ground that was【54】______before is now beginning to defrost. This could be a(n)【55】______of what will happen to the rest of the world in the next century. [br]
选项
答案
frozen
解析
第三段第二句提到阿拉斯加的很多土地was permanently frozen,or frozen for most of the year“过去为永久性冻土或一年中大部分时间是冰冻的”,而现在这些冻土is melting,这与题干陈述相符,所以答案为frozen。defrost解冻,除霜。
转载请注明原文地址:https://tihaiku.com/zcyy/3727509.html
相关试题推荐
Alaskaisdisappearingslowlybutsurely.Sincethe1950s,itisestimatedt
Alaskaisdisappearingslowlybutsurely.Sincethe1950s,itisestimatedt
Alaskaisdisappearingslowlybutsurely.Sincethe1950s,itisestimatedt
Alaskaisdisappearingslowlybutsurely.Sincethe1950s,itisestimatedt
Chinaisnowexperiencingthelargestmassmigrationofpeople,anestimated230
Whatreleasedanestimated8.7milliontonsoftheglobalwarminggas?[br][or
Whatreleasedanestimated8.7milliontonsoftheglobalwarminggas?[br][or
Whatreleasedanestimated8.7milliontonsoftheglobalwarminggas?[br][or
Whatreleasedanestimated8.7milliontonsoftheglobalwarminggas?[original
Alaskaisdisappearingslowlybutsurely.Sincethe1950s,itisestimatedt
随机试题
BritainisseparatedfromtherestofEuropebytheEnglishChannelinthe_____
《笠泽从书》的作者是()A.皮日休 B.陆龟蒙 C.罗隐 D.杜牧
木结构房屋中梁的耐火极限不应低于()h。A.3.0 B.2.0 C.1.
右图是一个长方形花坛,阴影部分是草地,空地是四块同样的菱形,则草地与空地的面积之
属于脾胃虚弱妊娠恶阻的症状为A.妊娠初期,呕吐不食,或呕吐清涎 B.妊娠初
A.直肠给药亦不可能达到预期的吸收效果,对新生儿的治疗作用有限B.与局部组织或器
A.脑震荡 B.脑挫裂伤 C.颅底骨折 D.颅盖骨折 E.硬脑膜外血肿开
在城市社会中,()揭示了城市的内在结构。A.社会分层 B.社会隔离 C.
模拟信号采用数字传输时,假定模拟信号承载的是数字数据,采用下列哪种设备再生信号(
投资项目决策分析与评价的基本要求包括贯彻落实科学发展观、资料数据准确可靠和()
最新回复
(
0
)