首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
共用题干 第一篇Water Resources on the EarthThe second most important constituent(构成...
共用题干 第一篇Water Resources on the EarthThe second most important constituent(构成...
admin
2020-12-24
45
问题
共用题干
第一篇
Water Resources on the Earth
The second most important constituent(构成成分)of the biosphere(生物圈)is liquid water. This can only exist in a very narrow range of temperatures,since water freezes at 0℃and boils a 100℃.Life as we know it would only be possible on the surface of a planet which had temperature: somewhere within this narrow range.
The earth's supply of water probably remains fairly constant in quantity.The total quantity of water is not known very accurately,but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers.Most of it is in the form of the salt water of the oceans一about 97 percent. The rest is fresh.But three-quarters of this is in the form of ice at the poles and or mountains and cannot be used by living systems until melted.Of the remaining fraction,which h somewhat less than one percent of the whole.There is 10—20 times as much stored underground water as there is actually on the surface.There is also a tiny,but extremely important fraction of the water supply which is present as water vapour in the atmosphere.
Water vapour in the atmosphere is the channel through which the whole water circulation(循环) of the biosphere has to pass.Water evaporated(蒸发)from the surface of the oceans,from lakes and rivers and from moist(潮湿的)earth is added to it. From it the water comes out again as rain or snow,falling on either the sea or the land. There is,as might be expected, a more intensive evaporation per unit area over the sea and oceans than over the land,but there is more rainfall over the land than over the oceans and the balance is restored by the run off from the land in the form of rivers.
选项
There is more of rainfall________.
A:over the mountains than over the rivers
B:over the rivers than over the mountains
C:over the land than over the oceans
D:over the oceans than over the land
答案
C
解析
文章第一段的第二句讲到液态水“only exist in a very narrow range of temperatures",虽然B(我们星球的表面)也有点道理,但是液态水对温度的要求很高,并非地球的所有表面都有液态水存在,所以答案D正确。
第二段第一句提到地球上水的供给“remains fairly constant in quantity",数量上是恒定的,它就没有增加也不会减少,只不过会以不同的形态出现,所以选择B(保持不变)。
问题是“地球上绝大部分淡水以什么形式出现?”第二段中间提到淡水时,说到“three-quarters of this is in the form of ice at the poles and on mountains",即3/4的淡水以冰的形式存在于两极和高山中,后面提到剩余部分的淡水存在于地下,但占比少于1%,所以选项A正确。
词义辫析题, fraction有“小部分”的意思,考虑到前面提到地球97%的水以海洋咸水的形式存在,剩下的3%则以冰的形式存在于两极和高山,余下的自然不多,所以选B。
第三段的最后一句说到“there is more rainfall over the land than over the oceans”,陆地的降雨比海洋要多,但没有提到河流和山脉的降雨比较,所以C正确。大气中的水蒸气是整个生物圈的水循环必经的途径。水从海洋的表面、湖泊、河流和潮湿的泥土中蒸发出来并补充到大气中。水以雨或雪的形式再次出现,降落在海洋或陆地上。可以预料到的是,海洋上空每单位面积的水蒸气比在陆地上空更为密集,但是,陆地比海洋有更多的降雨,水在陆地上以河流的形式流出以保持水资源的平衡。
转载请注明原文地址:https://ti.zuoweng.com/ti/tFMQKKKQ
相关试题推荐
下列关于负债的说法,错误的有()。A:负债是过去或目前的会计事项所构成的未来义务B:负债是企业过去经济利益的牺牲C:负债必须能以货币计量D:所有或有负债均
会计报表体系主要由()构成。A:资产负债表B:利润表C:现金流量表D:会计报表附注E:财务状况说明书
下列关于利润表的说法,错误的是()。A:利润表反映了企业一定期间经营成果B:企业应按收付实现制填制利润表C:利润表能够反映企业利润的构成及实现D:利润表有
GoingHerOwnWay Whenshewastwelve,Mariamadeherfirstimportantdecis...
GoingHerOwnWay Whenshewastwelve,Mariamadeherfirstimportantdecis...
GoingHerOwnWay Whenshewastwelve,Mariamadeherfirstimportantdecis...
GoodTableManners Mannersplayanimportantpartinmakingafavorableimp...
GoodTableManners Mannersplayanimportantpartinmakingafavorableimp...
Itisimportantforfamiliestoobservetheirtraditionsevenastheirchildr...
Youmustshineyourshoessinceyouattendtosuchanimportantparty.()A.lighte
随机试题
糖尿病 A.空腹血糖:6.8mmol/L B.OGTT1小时12mmol/L
常用的集中趋势指标不包括()。 A.变异系数 B.几何均数 C.算术均数
关于CBR试验的叙述有:①CBR试验是对压实试件泡水后的贯入试验;②CBR值是规
集体土地上的房屋转为国有土地上的房屋,申请人应当自土地权属性质变更之日起()日内
男性,25岁,双下肢挤压伤,神志尚清楚,表情淡漠,口渴明显,面色苍白,皮肤湿冷,
It'salwaysapleasuretoseemanyfriendshereinLondon.
以下哪项不是私募股权投资基金投资者关系管理的意义()。A、决定基金是否能顺利募集B、影响管理人的口碑和后续募集与发展C、可以维持基金的稳定性,避免投资者的
共用题干 刘某是一名实习护生,在未经带教护士的带领下单独为患者进行静脉穿刺,无意中将液体输错。如果刘某在带教老师的带领下发生差错事故,负责的应该是A:护生刘
某男,65岁。腰痛、俯仰困难病史10年,现症见腰脊疼痛、活动受限、足膝酸软、乏力,医师诊断为骨质疏松,证属肝肾不足、瘀血阻络。治疗宜选用的中成药是()。A.
A企业为矿山企业,地下金属矿山采用竖井、斜井、斜坡道联合开拓方式和下行分层胶结充填采矿方法。 2012年5月9日8时,司机甲和司机乙开始在井下115...