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
If the salinity (含盐量) of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of
If the salinity (含盐量) of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of
admin
2016-04-30
40
问题
If the salinity (含盐量) of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation—conversion of liquid water to water vapor. In this manner, the salinity is increased, since the salts stay behind. If this is carried to the extreme, of course, white crystals of salt would be left behind.
The opposite of evaporation is precipitation (降水), such as rain, by which water is added to the ocean. Here the ocean is being diluted(稀释) so that the salinity is decreased. This may occur in areas of high rainfall or in coastal regions where rivers flow into the ocean. Thus salinity may be increased by the subtraction of water by evaporation, or decreased by the addition of fresh water by precipitation or runoff (形成地表水部分的降雨).
Normally, in tropical regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. Similarly, in coastal regions where rivers dilute the sea, salinity is somewhat lower than in other oceanic areas.
A third process by which salinity may be altered is associated with the formation and melting of sea ice. When seawater is frozen, the dissolved materials are left behind. In this manner, seawater directly beneath freshly-formed sea ice has a higher salinity than it did before the ice appeared. Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water.
In the Weddell Sea, off Antarctica, the densest water in the oceans is. formed as a result of this freezing process, which increases the salinity of cold water. This heavy water sinks and is found in the deeper portions of the oceans of the world.
Coastal regions are mentioned as cases where _____.
选项
A、sea water is less salty because fresh water joins in
B、rivers carry industrial exhaust into sea
C、sea ice tends to melt more quickly than in the center of oceans
D、heavy water sinks to the deeper portions of the oceans
答案
A
解析
推理判断题。coastal regions字眼在文章中提到两遍,分别在第2段第3句及第3段最后一句。只要能够迅速查找到任何一处均可做出正确判断为A。B和C无原文支持;D张冠李戴,原文提及D内容涉及的是Weddell Sea,而非coastal regions。
转载请注明原文地址:https://kaotiyun.com/show/Fae7777K
0
大学英语四级
相关试题推荐
Ithasbeensaidthateveryonelivesbysellingsomething.Inthelightofthisstatement,teacherslivebyselling【C1】______,p
WhenRobertoFelizcametotheUSAfromtheDominicanRepublic,heknewonlyafewwordsofEnglish.Educationsoonbecameanig
A、VitaminAisessentialonlytoadults’eyesight.B、Vitaminscanonlybefoundinmeat,fruitandvegetables.C、Awellbalanced
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstofloodwatersarevictimsnotjustofnaturebutofhuman
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstofloodwatersarevictimsnotjustofnaturebutofhuman
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstofloodwatersarevictimsnotjustofnaturebutofhuman
A、Itispositive.B、Itisnegative.C、Ithastwosides.D、Thefriendshiphasnothingtodowiththeworkplace.C细节题。根据对话,男士表示工作场
HintsandTipstoSaveMoneyA)Spendless.Thisisnotoversimplifyingthebestwaytosavemoney!Itisessentialifyoua
HintsandTipstoSaveMoneyA)Spendless.Thisisnotoversimplifyingthebestwaytosavemoney!Itisessentialifyouar
HintsandTipstoSaveMoneyA)Spendless.Thisisnotoversimplifyingthebestwaytosavemoney!Itisessentialifyouar
随机试题
2019年某地区外商投资工业企业利润情况如下:该地区外商投资工业企业平均利润总额为()万元。
患者,男性,40岁。1年前因“慢性胆囊炎、胆囊结石”行胆囊切除术。2个月前餐后突发上腹剧痛,疼痛向后背、双肩部放射,伴发热39℃,次日出现黄疸,应用抗生素及利胆药物症状缓解。2个月来类似发作5次,仍行消炎利胆治疗缓解。查体:巩膜、皮肤黄染,腹平软,无压痛或
患者胃痛隐隐,喜温喜按,空腹痛甚,得食痛减,神疲乏力,大便溏薄,舌淡苔白,脉虚弱。其治法是
砌筑砂浆强度等级用(),共分为()级。
伪造会计凭证是指用涂改、挖补等手段来改变会计凭证的真实内容,歪曲事实真相的行为。()
下列激励薪酬的类型中,不属于员工个人激励薪酬形式的是()。
历史上京杭大运河的畅通,造就了众多沿河交通运转和贸易重镇,()是对运河兴盛时期东昌府的描述。
森林与水血脉相依,森林作为陆地生态系统的主体和自然界功能最完善的资源库,具有调节气候、涵养水源、保持水土、防风固沙、改良土壤、减少污染等多种功能,对保护人类生态环境起着决定性和不可替代的作用。森林可以涵养水源。据专家研究,森林对降雨有着重新分配的作用,25
Despitethescandalsoverleakede-mails,thescientificevidenceforglobalwarmingremainsstrong.Thequestion,then,istow
WhichaspectoftheHomesteadActof1862doesthepassagemainlydiscuss?Accordingtothepassage,howmanyofthefarmersw
最新回复
(
0
)