首页
登录
职称英语
What does the speaker say about the ocean’s level of saltiness? [br] [originalt
What does the speaker say about the ocean’s level of saltiness? [br] [originalt
游客
2024-10-24
17
管理
问题
What does the speaker say about the ocean’s level of saltiness? [br]
Scientists believe that when the oceans were young, they contained only a trace of salt, and that the level of salinity has been going up gradually. Over the years, rains have been wearing away the reek mantle of the continent. Minerals released by these erosion have been carded to the sea by the flow of river water. This water adds several billions tons of salt to the ocean annually. There are other sources of oceanic salinity too; one source is underwater volcanic action. These eruptions occurred along the mid-ocean ridge and release great amount of salt into the sea each year. However, these sources don’t increase the actual mineral composition of the water by much because the enormous chemical requirements of marine life. Oysters, clams, snails and other mollusk use salt to build shells and skeletons. Coral reefs also consume large amount of salt. Also, some salt leaves the ocean through the process of evaporation. As salts escape into the atmosphere, they go into the creation of rain drops, this is why the coast receives more rain. Salt exists in the atmosphere near the ocean, thereby attracting the increased moisture and producing rain.
选项
A、Erosion of rock mantle.
B、Volcanic eruption near coastal area.
C、Dead bodies of marine life.
D、Evaporation of rain water.
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3814695.html
相关试题推荐
WhoisKenLivingstone?[br][originaltext]TheMayorofLondonKenLivings
WhoisKenLivingstone?[originaltext]TheMayorofLondonKenLivingstoneh
WhichstatementisCORRECT?[br][originaltext]TheinternationalOlympicC
WhichstatementisCORRECT?[originaltext]TheinternationalOlympicCommitt
Thehusband______.[br][originaltext]M:We’vebeenwallingformorethan30mi
Thehusband______.[br][originaltext]M:We’vebeenwallingformorethan30mi
Whatisthepurposeofthementionedfederallaw?[br][originaltext]Afed
Whatisthefocusoftheprogram?[br][originaltext]TheHousevotedThurs
WhatisBush’sreactiontowardsUStroopwithdrals?[br][originaltext]Pr
Hildaisatthebicycleshop______.[originaltext]W:Hi,Steven.M:Oh,hi,Hil
随机试题
TheEuropeanCourtofHumanRightsruledTuesdaythatAbuQatada,aradical
Thisbrandofmotorcycleis(economy)______offuel.economical
NationalpartiesintheUnited’Stateshavegenerallybeenweakinstructureand
为了履行自己在人力资源管理方面新承担的职责,扮演好诸多重要角色,组织的高层管理者
把实践证实的理论看成是永恒不变的绝对真理,并当成检验其他一切认识是否正确的标准,
根据预测,依托全球能源互联网,到2050年全球能源碳排放为2013年的()。A
“没有无义务的权利,也没有无权利的义务。”这表明()。A.公民的权利与义务相互
教师的角色属于()。 (A)成就角色(B)规定性角色 (C)表现型角色
祖父母、外祖父母属于第二顺序继承人,享有继承权,其继承方式不包括( )。A.法
企业持有交易性金融资产期间,对于被投资单位宣告发放的现金股利,应借记“交易性金融
最新回复
(
0
)