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
财经
When we analyze the salt salinity(盐浓度)of ocean waters, we find that it varies only slightly from place to place. Nevertheless, s
When we analyze the salt salinity(盐浓度)of ocean waters, we find that it varies only slightly from place to place. Nevertheless, s
admin
2015-04-08
28
问题
When we analyze the salt salinity(盐浓度)of ocean waters, we find that it varies 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. In this manner, the salinity is increased, since the salt stays behind. If this is carried to the extreme, of course, white salt would be left behind; this, by the way, is how much of the table salt we use is actually obtained.
The opposite of evaporation is precipitation, such as rain, by which water is added to the ocean. Here the ocean is being diluted 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.
Normally, in hot 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, the densest water in the ocean 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 portion of the oceans of the world.
It can be known from the passage that increase in the salinity of ocean water is caused by______.
选项
A、melting of sea ice
B、precipitation
C、evaporation
D、supplement of salt
答案
C
解析
根据第一段“One of these is the subtraction of water from the ocean by means of evaporation.In this manner,the salinity is increased.”可知,答案为C,即海水蒸发可使盐度增加。
转载请注明原文地址:https://jikaoti.com/ti/iE2QFFFM
本试题收录于:
英语题库银行系统招聘考试分类
0
英语
银行系统招聘考试
相关试题推荐
杯中原有浓度为18%的盐水溶液100ml,重复以下操作2次,加入100ml水,充分融合后,倒出100ml溶液,则杯中盐水溶液的浓度变成了多少?()
ForgetTwitterandFacebook,GoogleandtheKindle.Televisionisstillthemostinfluentialmedi—umaroundIndeed,notmanyofthe
ForgetTwitterandFacebook,GoogleandtheKindle.Televisionisstillthemostinfluentialmedi—umaroundIndeed,notmanyofthe
Whenweanalyzethesaltsalinity(盐浓度)ofoceanwaters,wefindthatitvariesonlyslightlyfromplacetoplace.Nevertheless,s
Todaytelevisionisoneofthemostpopularformsofentertainmentinthehome.Somepeopleinplaceswheretelevisionreception
Whenweanalyzethesaltsalinity(盐浓度)ofoceanwaters,wefindthatitvariesonlyslightlyfromplacetoplace.Nevertheless,s
Themassmediainfluencesall【C1】______ofourlives,includingthelearningof【C2】______roles.Newspapersandmagazines,televis
Themassmediainfluencesall【C1】______ofourlives,includingthelearningof【C2】______roles.Newspapersandmagazines,televis
随机试题
骨髓穿刺吸取骨髓液的量不应超过0.2ml,其原因是
有关脑挫裂伤临床表现的描述错误的是()。
射血分数是表示
颈椎骨折进行颅骨牵引时,采取的卧位是
对CT准直器作用的论述,错误的是
男,18岁,幼年起反复发生喘息,多在夏秋季发作。3小时前因进入刚装饰过的房间发生严重呼吸困难,遂来急诊,呼吸急促,大汗,不能平卧。此时最需要给予的治疗措施是
我国进入社会主义初级阶段的标志是()。
甲去世后,其子乙继承了其名下的房屋两间。不久,乙将房屋卖给了丙。则下列表述正确的是()。
函数ReadDat()的功能是实现从文件ENG4.1N中读取一篇英文文章,存入到字符串数组xx中。请编制函数encryptChar(),按给定的替代关系对数组xx中的所有字符进行替代,结果仍存入数组xx对应的位置上,最后调用函数WriteDat()把结果x
Americanstodayhavedifferenteatinghabitsthantheyhadinthepast.Thereisawide【C1】______offoodavailable.Theyhave
最新回复
(
0
)