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
Polar bears hunt seals from sea ice, but could drown if forced to swim long distances in open water. Satellite photos【B1】______b
Polar bears hunt seals from sea ice, but could drown if forced to swim long distances in open water. Satellite photos【B1】______b
admin
2013-10-17
33
问题
Polar bears hunt seals from sea ice, but could drown if forced to swim long distances in open water. Satellite photos【B1】______by America’s space agency, NASA, illustrate the fearful【B2】______ to such bears. An image shows the amount of Arctic Sea ice in 1979. Another image shows the record【B3】______set this year on September 16th. The shrinkage is【B4】______to an area greater than Texas, an impossible distance for even the【B5】______polar bear to swim.
Scientists say fossil fuels are increasing carbon【B6】______ in the atmosphere. This not only warms the oceans, but threatens biodiversity in cold and warm waters alike. As the carbon dioxide is increased in the atmosphere, a high【B7】______, about 40 percent of that, goes back into the ocean, and so it’s increasing the acid【B8】______of the ocean and that’s threatening fisheries.
Scientists at a recent conference at Columbia University’s Earth Institute said【B9】______. This is because a northern route, though still risky, reduces the distance between Europe and Asia by about 6,500 kilometers.
Countries bordering the Arctic are not the only ones with interests there.【B10】______; that’s very clear for natural resources, for fishing, for a variety of reasons. Energy supplies are among those reasons. Scientists say more open water in the Arctic means more gas from water and extreme weather elsewhere.
The Arctic is far from most of the world’s population.【B11】______.
【B7】
Polar bears hunt seals from sea ice, but could drown if forced to swim long distances in open water. Satellite photos(36)released by America’s space agency, NASA, illustrate the fearful(37)threat to such bears. An image shows the amount of Arctic Sea ice in 1979. Another image shows the record(38)minimum set this year on September 16th. The shrinkage is(39)equivalent to an area greater than Texas, an impossible distance for even the(40)mightiest polar bear to swim.
Scientists say fossil fuels are increasing carbon(41)emissions in the atmosphere. This not only warms the oceans, but threatens biodiversity in cold and warm waters alike. As the carbon dioxide is increased in the atmosphere, a high(42)proportion, about 40 percent of that, goes back into the ocean, and so it’s increasing the acid(43)content of the ocean and that’s threatening fisheries.
Scientists at a recent conference at Columbia University’s Earth Institute said(44)less ice is likely to draw some shipping away from the Panama Canal. This is because a northern route, though still risky, reduces the distance between Europe and Asia by about 6,500 kilometers.
Countries bordering the Arctic are not the only ones with interests there.(45)There certainly will be interest in the Arctic from nations that don’t touch physically on the Arctic; that’s very clear for natural resources, for fishing, for a variety of reasons. Energy supplies are among those reasons. Scientists say more open water in the Arctic means more gas from water and extreme weather elsewhere.
The Arctic is far from most of the world’s population.(46)However, scientists caution that distance is no guarantee people will be spared the effects of warming in the planet’s northernmost regions.
选项
答案
proportion
解析
此处应填入一个名词,由前面的形容词high修饰。proportion意为“比例”。
转载请注明原文地址:https://kaotiyun.com/show/urc7777K
0
大学英语四级
相关试题推荐
Thestarsareusuallyactorsandactresses.Mostpeopledonotevenlookatthenameofthedirectororproducer,exceptone-Ste
Dr.Sternberghasproposedatheoryofintelligencethatincludessuchtraitsashowwellapersonplansstrategiesforproblem-
Dr.Sternberghasproposedatheoryofintelligencethatincludessuchtraitsashowwellapersonplansstrategiesforproblem-
WhenRobertoFelizcametotheUSAfromtheDominicanRepublic,heknewonlyafewwordsofEnglish.Educationsoonbecamea【S1】
A、ToputthekeyonDon’sdesk.B、TogradeexampapersforDon.C、TogiveDon’sstudentsthenextassignment.D、TocallDonatt
Onedayapoliceofficermanagedtogetsomefreshmushrooms.Hewassopleased【C1】______whathehadboughtthathe【C2】______
A、Newtrafficrules.B、Trafficjamsonhighways.C、Airtrafficconditions.D、Roadconditions.C
Thereisalwayssomeoneinyourlife____________(其言行对你影响最大).
Themostexcitingkindofeducationisalsothemostpersonal.Nothingcanexceedthejoyofdiscoveringforyourselfsomething
随机试题
A.EB病毒B.乳头瘤病毒C.乙型肝炎病毒D.埃可病毒鼻咽癌的致癌因素是
以下哪项不是乳腺纤维腺瘤的超声表现
男性,70岁。既往体健,10天前曾应用庆大霉素抗感染治疗。尿量800ml,尿常规示PRO(+),可见颗粒管型,BUN18.8mmol/L,Cr373μmol/L,HGB12.1g/dl。庆大霉素对肾脏损伤的部位是
A、快速耐受性B、成瘾性C、耐药性D、反跳反应E、高敏性吗啡易引起
医疗卫生法规的宗旨是()。
如果回收金额是确定的。净现值计算只需反映回收金额的时间价值,风险折现率是合适的选择。()
证券资产的价格风险是指()。
Itisanadvertisementfor______.Whichofthefollowingistrue?
CPU主要技术性能指标有()。
Because______(好大学的文凭是好工作的敲门砖),educationisoneofthemostcompetitiveareasinJapaneselife.
最新回复
(
0
)