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
职业资格
The geology of the Earth’s surface is dominated by the particular properties of water. Present on Earth in solid, liquid, and ga
The geology of the Earth’s surface is dominated by the particular properties of water. Present on Earth in solid, liquid, and ga
admin
2022-12-06
23
问题
The geology of the Earth’s surface is dominated by the particular properties of water. Present on Earth in solid, liquid, and gaseous states, water is exceptionally reactive. It dissolves, transports, and precipitates many chemical compounds and is constantly
modifying
the face of the Earth.
Evaporated from the oceans, water vapor forms clouds, some of which are transported by wind over the continents. Condensation from the clouds provides the essential agent of continental erosion: rain. Precipitated onto the ground, the water trickles down to form brooks, streams, and rivers, constituting what are called the hydrographic network. This immense polarized network channels the water toward a single receptacle: an ocean. Gravity dominates this entire step in the cycle because water tends to minimize its potential energy by running from high altitudes toward the reference point, that is, sea level.
The rate at which a molecule of water passes through the cycle is not random but is a measure of the relative size of the various reservoirs. If we define residence time as the average time for a water molecule to pass through one of the three reservoirs (atmosphere, continent, and ocean), we see that the times are very different. A water molecule stays, on average, eleven days in the atmosphere, one hundred years on a continent and forty thousand years in the ocean. This last figure shows the importance of the ocean as the principal reservoir of the hydrosphere but also the rapidity of water transport on the continents.
A vast chemical separation process takes place during the flow of water over the continents. Soluble ions such as calcium, sodium, potassium, and some magnesium are dissolved and transported. Insoluble ions such as aluminum, iron, and silicon stay where they are and form the thin, fertile skin of soil on which vegetation can grow. Sometimes soils are destroyed and transported mechanically during flooding. The erosion of the continents thus results from two closely linked and interdependent processes, chemical erosion and mechanical erosion. Their respective interactions and efficiency depend on different factors.
In the first paragraph, the underlined word "modifying" is closest in meaning to
选项
A、dominating
B、altering
C、improving
D、damaging
答案
B
解析
词汇题。根据第一段中的“It dissolves,transports,and precipitates many chemical compounds and is constantly modifying the face of the Earth”可知这里是指水不断地改变地球表面。modify在这里表示“改变”的意思。dominate“支配,控制”,alter“改变,更改”,improve“改善,提升”,damage“毁坏”。故本题选B。
转载请注明原文地址:https://kaotiyun.com/show/8OjD777K
本试题收录于:
英语学科知识与教学能力题库教师资格分类
0
英语学科知识与教学能力
教师资格
相关试题推荐
导游人员在各旅游企业之间起着重要的协调作用,这主要体现的是导游人员()的作用。
某城市社区共有住户600户,18周岁以上的居民1500人,共分设30个居民小组,成立了业主委员会,聘用了一家物业管理公司。根据《城市居民委员会组织法》,若该社区()提议,应当召集居民会议。
某大型企业想在内部筹建一个女工互助小组,用来缓解或解决女职工在工作或生活中遇到的一些压力或困难,此小组的建立()。
Nevertheless,manyteachersalsofeelfrustratedbythelimitationsofthismodel,especiallywhenlectureandpresentationtake
Whichofthefollowingshowsthecorrectstressoftheword"pedestrian"?
Ifateacherasksstudentstopayattentiontothetensewhenmakingupdialogues,he/shefocuseson________.
Thefashionindustryblatantlypaysattentiontoplus-sizewomen.Agoodfitiseverything,stylistsoftencounsel,butinasses
Thespinyproblemwehavefacedis_________wecanpreventandcurethelossofsoilandwater.
随机试题
关于抹灰工程施工环境要求的说法,正确的是()。
由于长时间封井,造成胶芯永久变形,应()。
--Hi,John!Iwanttobuyapairofshoes,butIcan’tfindtheshoeshop.--Comewithme,Iknow______nearby.
下列对哌仑西平的描述哪一项有错:
治疗忧郁伤神型郁证的最佳选方是
侵蚀性葡萄胎脑转移腰穿的目的是
具有“运化水液”功能的脏是
如果按工业用途进行评估,估价目的为保险估价,估价时点为2001年5月9日,其合理的评估价值约为()万元。文中所述厂房,对其进行估价,首先应了解()。
期货从业人员在进行投资分析或者提出投资建议时,应当勤勉尽责、(),投资分析及投资建议要有合理、充足的依据,要严格区分客观事实与主观判断,并对重要事实予以明示。
ForestsforCitiesYouarestandinginabeautifulforestinJapan.Theairiscleanandsmellslikeplantsandflowers.Ther
最新回复
(
0
)