首页
登录
职称英语
A new study, published in the international scientific journal Nature, revea
A new study, published in the international scientific journal Nature, revea
游客
2024-03-07
28
管理
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." [br] What did scientists think of new water reserves under the sea?
选项
A、They are the same as seawater, which is salty.
B、They can be found anywhere in the ocean.
C、They can be only found in unusual and particular conditions.
D、They are not able to be turned into potable water.
答案
C
解析
细节题。根据该题干关键信息scientists think可定位到原文第三段,该段提到,科学家认为只有在极少的特殊情况下,海底才会存在淡水,A选项错误,因为这些水是低盐度水;B选项错误,因为这些水并不是到处都有;D选项也错误,这些水可以转化为饮用水,只有C选项符合,故选C。
转载请注明原文地址:https://tihaiku.com/zcyy/3512915.html
相关试题推荐
A、Drivers.B、Songwriters.C、Journalists.D、Fastfoodcooks.C
[originaltext]Thestudyon400children.inthejournalScience,initially
AccordingtoascientificstudypublishedinApril,2015,birdshaveshownt
AccordingtoascientificstudypublishedinApril,2015,birdshaveshownt
AccordingtoascientificstudypublishedinApril,2015,birdshaveshownt
AccordingtoascientificstudypublishedinApril,2015,birdshaveshownt
AccordingtoascientificstudypublishedinApril,2015,birdshaveshownt
AccordingtoascientificstudypublishedinApril,2015,birdshaveshownt
A)Oneofthelittleritualsallinternationaltravelersgothroughiscusto
A)Oneofthelittleritualsallinternationaltravelersgothroughiscusto
随机试题
Forthispart,youareallowed30minutestowriteashortessaybasedonth
College-boundAmericanhighschoolstudentsusuallyhavesomecombinationof
Whenonehasgoodhealth,______shouldfeelfortunate.A、youB、theyC、heD、weC句意
上海甲公司在餐馆项目上注册了“桃林”商标。2019年2月10日,甲公司与西安乙公
()属于证券的系统风险。A:企业违约风险 B:某厂职工罢工引起股票下跌的风险
某高血压患者,男性,57岁,有胃溃疡病史。该患者宜选用的降压药是A.氢氯噻嗪
下列关于植物甾醇叙述不正确的是A.骨甾醇、豆甾醇等为常见植物甾醇 B.为甾体的
在行政审判中,法律规范冲突的不同情形主要有()。A.特别法与普通法之间的冲突
案例八: 一般资料:张某。女性,19岁,大学一年级学生。 案例介绍:张某以高
7个月患儿,腹泻水样便,每天10余次。为稀水样便,今日病儿昏睡,呼吸深快,尿量极
最新回复
(
0
)