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
A new study, published in the international scientific journal Nature, revealed that an estimated half a million cubic kilometer
A new study, published in the international scientific journal Nature, revealed that an estimated half a million cubic kilometer
admin
2022-09-18
28
问题
A new study, published in the international scientific journal Nature, revealed that an estimated half a million cubic kilometers of low-salinity water are buried beneath the seabed on continental shelves around the world.
"The volume of this water resource is a hundred times greater than the amount we’ve extracted from the Earth’s sub-surface in the past century since 1900," says lead author Dr. Vincent Post of the National Centre for Groundwater Research and Training (NCGRT) and the School of the Environment at Flinders University.
Dr. Post said that while scientists knew of freshwater under the seafloor, they thought it only occurred under rare and specific conditions.
These reserves were formed over the past hundreds of thousands of years when on average the sea level was much lower than it is today, and when the coastline was further out, Dr. Post explains.
"So when it rained, the water would infiltrate into the ground and fill up the water table in areas that are nowadays under the sea.
"It happened all around the world, and when the sea level rose when ice caps started melting some 20,000 years ago, these areas were covered by the ocean.
"These aquifers (含水层) protected from seawater by layers of clay and sediment that sit on top of them."
The aquifers are similar to the ones below land, which much of the world relies on for drinking water, and their salinity is low enough for them to be turned into potable water, Dr. Post says.
"There are two ways to access this water—build a platform out at sea and drill into the seabed, or drill from the mainland or islands close to the aquifers.
"Freshwater on our planet is increasingly under stress and strain so the discovery of significant new stores off the coast is very exciting. It means that more options can be considered to help reduce the impact of droughts and continental water shortages."
But while nations may now have new reserves of freshwater offshore, Dr. Post says they will need to take care in how they manage the seabed: "For example, where low-salinity groundwater below the sea is likely to exist, we should take care not to contaminate it.
Dr. Post also warns that these water reserves are non-renewable: "We should u; them carefully—once gone, they won’t be refilled until the sea level drops again."
What should we do to protect these reserves according to Dr. Post?
选项
A、Take care of the clay and sediment in the ocean.
B、Take care of the seawater that is above the reserves.
C、Do not contaminate the underground water that is around the reserves.
D、Do not contaminate the places where the reserves are likely to exist.
答案
D
解析
细节题。根据题干中的protect these reserves可定位到倒数第二段,该段提到为了保护海底地下水,我们应该避免污染可能存在海底地下水的区域,D选项符合,故选D。
转载请注明原文地址:https://kaotiyun.com/show/HbR7777K
0
大学英语六级
相关试题推荐
A、Peopleshouldcutdowntheirconsumption.B、Developingcountriesshouldmakegreaterefforts.C、Theworldshouldrealizethep
A、It’sanotherwaytoloseweightB、It’sverycheap.C、It’snotsocrowded.D、It’snearby.D女士说娱乐中心离她的住处很近,故选D。
A、English.B、Zulu.C、Indian.D、French.B男士说南非最常用的语言是原住民说的祖鲁语,故选B。A是强干扰项,男士虽然说大部分人都会说英语,但是实际上南非有11种官方语言,英语只是其中一种,接着说祖鲁语才是最常用的,所以排
A、Itislessening.B、Itisgrowing.C、Ithasn’tchanged.D、Itisslowlychanging.B短文开头介绍,在1986年出台了禁止商业捕鲸的政策之后,鲸鱼的死亡数字每年都呈上升趋势,故
A、Theyencouragemorehomelesspeople.B、Theyareasafetyhazard.C、Theytakeupparkingspaces.D、Theydestroytheneighborhoo
A、Englishisthesoleofficiallanguage.B、FewpeoplespeakEnglishthere.C、IthasthelargestIndianpopulationoutsideofAme
A、Alargeamountofmoneywasdonatedbyanunknownplayer.B、Aschoolfellowraisedmillionsofdollarsfortheconstruction.C、
A、Theyshouldbeadaptedtotheneedofthepresentsociety.B、Theyshouldteachchildrentobeawareofsocialproblems.C、They
A、Theycanrecognizethedifferencebetweentwolanguages.B、Theycanonlyidentifythesoundsofthenativelanguage.C、Theyca
A、Shehasvisionproblems.B、Sheisingoodhealth.C、Sheisbecomingstronger.D、Sheisoutofcondition.B
随机试题
国际战略联盟
下列各选项中,符合《宪法》规定的是()。
一般对盾构掘进注浆时,以弥补一次注浆缺陷为目的进行的注浆是( )。
在评价财政支出效益时,下面财政支出项目中,适合采用最低费用选择法的有( )。
某企业因不能清偿到期债务而决定申请破产重整,对企业实施拯救,措施之一是裁减50%的职工。对于裁减人员的程序和范围,以及应给予被裁减人员的待遇,该企业管理人员对法律规定的理解不一致,有的说,只要工会同意,所有员工均可以被裁减;也有的说,裁减人员可以不给予经济
(2018年)2×17年1月1日,甲公司溢价购入乙公司当日发行的到期一次还本付息的3年期债券,作为债权投资核算,并于每年年末计提利息。2×17年年末,甲公司按照票面利率确认当年的应计利息590万元,利息调整的摊销金额10万元,不考虑相关税费及其他因素,2×
对未达账项应编制银行存款余额调节表进行调整,并据以编制记账凭证登记入账。()
()是指工作结果对组织有重大影响的活动或大量的重复性活动。
如图,在梯形ABCD中,AB与CD平行,O为AC与BD的交点,CO=2AO,则梯形ABCD与三角形AOB的面积之比()。
ThethirdannualStudentInventionFairwill______placeinOxford,England.
最新回复
(
0
)