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
39
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.
The Weddell Sea_____.
选项
A、is a good example of increased salinity in freezing sea water
B、is much larger in area than the Arctic oceans
C、has a much lower salinity now than ever
D、has the denser water in its upper parts
答案
A
解析
推理判断题。选项A是对最后一段第1句的同义改写。同一句可知选项C错。选项B根本没有提及。文章最后一句表明D正好与事实相反。
转载请注明原文地址:https://kaotiyun.com/show/Uae7777K
0
大学英语四级
相关试题推荐
AFewAspectsofAmericanLifeTravelA)It’ssummertime.FormanyAmericans,thisistheseasontotravel.Why?Becauseschool
Ithasbeensaidthateveryonelivesbysellingsomething.Inthelightofthisstatement,teacherslivebyselling【C1】______,p
WhenRobertoFelizcametotheUSAfromtheDominicanRepublic,heknewonlyafewwordsofEnglish.Educationsoonbecameanig
WhenRobertoFelizcametotheUSAfromtheDominicanRepublic,heknewonlyafewwordsofEnglish.Educationsoonbecameanig
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstofloodwatersarevictimsnotjustofnaturebutofhuman
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstofloodwatersarevictimsnotjustofnaturebutofhuman
WhoKilledtheSeaLions?A)Sittingintheturbulent(汹涌的)watersbelowtheBonnevilleDamontheColumbiaRiver,eastofPortland
HintsandTipstoSaveMoneyA)Spendless.Thisisnotoversimplifyingthebestwaytosavemoney!Itisessentialifyoua
HintsandTipstoSaveMoneyA)Spendless.Thisisnotoversimplifyingthebestwaytosavemoney!Itisessentialifyoua
HintsandTipstoSaveMoneyA)Spendless.Thisisnotoversimplifyingthebestwaytosavemoney!Itisessentialifyouar
随机试题
A.药品说明书B.药品内标签C.药品外标签D.原料药标签E.运输包装的标签根据《药品说明书和标签管理规定》至少应当标注药品通用名称、规格、产品批号、有效期的是
要求承包商递交项目的阶段或部分结果的文件,而不是项目的最终结果的是()合同。
图示某6层普通住宅,采用钢筋混凝土抗震墙结构。抗震墙底部加强部位的高度范围H标注正确的是()。
工程项目承包商的风险可以归纳为( )。
股权投资基金管理人违反《私募投资基金信息披露管理办法》的,基金业协会对直接负责的主管人员和其他直接负责人员可采取()纪律处分。I.行业内谴责Ⅱ.加入黑名单Ⅲ.撤销管理人登记Ⅳ.取消基金从业资格Ⅴ.谈话提醒
下列有关责权发生制的说法,正确的有()。
[2012]甲公司是ABC会计师事务所的常年审计客户,主要从事a、b和c三类石化产品的生产和销售。A注册会计师负责审计甲公司2011年度财务报表,按照税前利润的5%确定财务报表整体的重要性为60万元。资料一:A注册会计师在审计工作底稿中
人类中的智力缺陷者,无论经过怎样的培训和教育,也无法达到智力为正常水平者能达到的智力水平,同时,新生婴儿如果没有外界的刺激,尤其是人类社会环境的刺激也同样达不到人类的正常智力水平,甚至还会退化为智力缺陷者。下列哪项作为上述这段叙述的结论最为恰当?(
下列级数中属于条件收敛的是
【B1】【B20】
最新回复
(
0
)