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
Tundra ecosystems are treeless regions found in the Arctic and on the tops of mountains, where the climate is cold and windy and
Tundra ecosystems are treeless regions found in the Arctic and on the tops of mountains, where the climate is cold and windy and
admin
2022-06-23
33
问题
Tundra ecosystems are treeless regions found in the Arctic and on the tops of mountains, where the climate is cold and windy and rainfall is low. Tundra lands are snow-covered for most of the year, until summer brings a burst of wild flowers.
The Arctic tundra, where the average temperature is rather low, supports a variety of animal species, including Arctic foxes, polar bears, Arctic wolves, caribou, snow geese and musk oxen. The summer growing season is just 50 to 60 days, when the sun shines 24 hours a day.
The few plants and animals that live in the harsh conditions of the tundra are essentially clinging to life. They are highly vulnerable to environmental stresses like reduced snow cover and warmer temperatures brought on by global warming.
The Arctic tundra is changing dramatically due to global warming. Already, more southern animals like the red fox have moved onto the tundra. The red fox is now competing with the Arctic fox for food and territory.
Another major concern is that the melting of the permafrost (永冻土层) is contributing to global warming. Estimates suggest that about 14 percent of the Earth’s carbon is tied up in the permafrost. Until recently, the tundra acted as a carbon sink and captured huge amounts of carbon dioxide from the atmosphere as part of photosynthesis(光合作用). This process helped keep the amount of this greenhouse gas from accumulating in the atmosphere. Today, however, as the permafrost melts and dead plant material rots(腐烂) and releases CO
2
, the tundra has changed from a carbon sink to a carbon contributor.
You can possibly find this passage in________.
选项
A、Business Week
B、The Economist
C、National Geographic
D、Sports lllustrated
答案
C
解析
通读全文可知,本文主要讲述了苔原的地理位置、气候条件、物种、现状以及面临的问题等,属于地理方面的话题。由此可推知,其有可能在《国家地理》(National Geographic)杂志上出现。A项意为“《商业周刊》”;B项意为“《经济学人》”;D项意为“《体育域报》”,这三项均不符合题意。故选C。
转载请注明原文地址:https://jikaoti.com/ti/mz6iFFFM
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
认识是在实践中主体对客体的能动反映,这是
试述社会形态发展的统一性和多样性的含义及表现。
A.Pleaseallowmetoproposeatoasttoyourhealth.B.Peoplewhoareoverconfidenttendtoneglecttheirdeficiencies.C.Liv
Thisisactuallymorefunthansittingbeingsilentlymiserablebecauseyouarenotsayinganything.
Vitaminsareimportanttoourhealth.Differentvitaminsarefoundindifferentfoods,grains,vegetablesandfruits,fishandm
Vitaminsareimportanttoourhealth.Differentvitaminsarefoundindifferentfoods,grains,vegetablesandfruits,fishandm
Tooursurprise,Jackscored400________anaverageof250inarecentEnglishcompetition.
Trip1OneWeekintheMountainsBringyourstrongshoesandwarmclothesforthiswalkinabeautifulareaoftheGreenMou
Trip1OneWeekintheMountainsBringyourstrongshoesandwarmclothesforthiswalkinabeautifulareaoftheGreenMou
Peopleandthesourcesofairpollutionarefoundinthesameplaces.Thismeansthatcitieswithlargepopulationshavethebig
随机试题
某男,27岁。淋雨后出现寒战、高热、咳嗽、咯吐铁锈色痰。应首先考虑的是
A.变质性炎症B.浆液性炎症C.增生性炎症D.化脓性炎症E.出血性炎症流行性脑脊髓膜炎属于
保险合同的法定条款有哪些?
当衬里采用树脂胶泥衬砌块材时,应先在设备或管道表面涂刷()封底料一遍。
在计算机领域通常用MIPS来描述()
—Thegamelastnightwassogood.—Yeah!Ourschoolteamwon______twopoints!
小张去机票代理处为单位团购机票10张。商务舱定价每张1200元,经济舱定价每张700元,由于买的数量较多,代理商就给予了优惠,商务舱按定价的9折付钱,经济舱按定价的6折付钱,如果他付的钱比按定价少31%,那么小张共买经济舱票的张数是()。
王某担任某县高二英语教师期间通过了硕士研究生入学考试,学校以王某服务期未满、学校英语教师不足为由不予批准王某在职学习。王某欲以剥夺其参加进修权利为由提出申诉,受理申诉的机构应当是()。
唐朝受理行政案件的司法机关是()。
设随机变量X在1,2,3,4四个数字中等可能取值,随机变量Y在1~X中等可能地取一整数值.P{X=Y}.
最新回复
(
0
)