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
专升本
Some desert regions get no rainfall for months, and even years. Yet water can be found if you dig deep enough. For a long time t
Some desert regions get no rainfall for months, and even years. Yet water can be found if you dig deep enough. For a long time t
admin
2012-02-24
15
问题
Some desert regions get no rainfall for months, and even years. Yet water can be found if you dig deep enough. For a long time this was a puzzling question. Then geologists found the answer. The underground water is rainwater--but the rain fell hundreds of miles away! It soaked into the ground and then flowed underground through a rock sandwich.
A rock sandwich with water in the filling has a scientific name: aquifer. An aquifer is composed of two or more layers of nonporous rock. That’s the bread of the sandwich. The filling is a layer of porous rock or sand. The whole sandwich, or aquifer, is titled at a slant. The higher end is in a region of good rainfall, where the rain soaks into the porous rock or sand. The rainwater flows down at a slant between the nonporous rock layers. If a well is drilled through the top layer, the water flows up into the well.
If the upper end of the aquifer is higher than the top of the well, the water is forced up without pumping. This convenient arrangement is called an artesian well because this kind of well was first developed in Artois, France.
After the rain soaks into rocks, the rain water flows ______.
选项
A、into the well
B、down between rock layers
C、through the sandwich
D、to the dry regions
答案
B
解析
第二段后半部分。降雨过后,雨水会渗透到岩石和沙子中,然后顺岩石间的斜面往下流。选项B是正确的。
转载请注明原文地址:https://jikaoti.com/ti/lp3GFFFM
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Evenwhenshedidn’tknowwhatshe______about,shespokemoreauthoritativelythanmostpeopledid.
Howmanycountrieswill______inthe2008OlympicGames?
Itwas______thatahundredpeoplelookedlostinit.
Thefirstsnowboardsweremadeinthe1960s.However,itwasinthelate1970sthattheybecamemore【C1】______Throughoutthe198
Thefirstsnowboardsweremadeinthe1960s.However,itwasinthelate1970sthattheybecamemore【C1】______Throughoutthe198
Thefirstsnowboardsweremadeinthe1960s.However,itwasinthelate1970sthattheybecamemore【C1】______Throughoutthe198
"Iloveyou,Bob.""Iloveyou,too,Nancy."Itwas2a.m.andIwashearingmyparents’voicesthroughthethinwallseparating
"Iloveyou,Bob.""Iloveyou,too,Nancy."Itwas2a.m.andIwashearingmyparents’voicesthroughthethinwallseparating
Itis_____thatmynephewisreallyfondofclassicmusic,whichhehasbeenexposedto(熏陶)foryears.
KeyJames,SecretaryofHealthandHumanResourcesintheVirginiaStategovernment,lovestoturnthetablesonthosewhodon’t
随机试题
按检验的目的划分,感官检验方法可分为差别检验、标度和类别检验、分析或描述检验。
物质的根本属性是()。
承包商向水泥厂购买袋装水泥并按合同约定支付全部货款。因运输公司原因导致水泥交货延误2天,承包商收货后要求水泥厂支付违约金,水泥厂予以拒绝。承包商认为水泥厂违约,因而未对堆放水泥采取任何保护措施,次日大雨,水泥受潮全部硬化。此损失应由()承担。
张某为自己的房屋向某保险公司投保,主要保障因自然灾害和意外事故造成的房屋损失。保险公司接受了张某的投保单和保险费,但尚未表示同意承保。在此期间张某的房屋因泥石流毁损。对此下列选项表述不正确的是()。
为了提高办理刑事案件的质量和效率,各地区( )之间应当互相协作和配合。
美育
儿童第一语言习得的过程。
一位出版商现在为大学教授提供了为他们的课程订阅定制课本的选择权。这些教授可以删掉一本书中他们不感兴趣的章节,同时可加入他们自己选择的材料。上面提及的选择权的广泛使用最不可能有助于实现下面哪个教育目标?
算法的空间复杂度是指()。
_____l"orage,ilfaisaittrèschaud.
最新回复
(
0
)