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
Water is important for pupils to study, not only because it is so abundant, covering three times as much of the earth’s surface
Water is important for pupils to study, not only because it is so abundant, covering three times as much of the earth’s surface
admin
2011-02-28
36
问题
Water is important for pupils to study, not only because it is so abundant, covering three times as much of the earth’s surface as land does. It is the most common substance in living plant and animal tissues; without it, most other chemicals needed for life could not get into or out of cells. Its floatability makes it possible to move people and cargoes by ship--without which early exploration and commerce would have been impossible. Hydroelectric(水电) stations are and will continue to be a major source of electrical energy. Water is also important for sanitation (卫生) and recreation.
Early experiences with liquids should include those dealing with floatability, change of state, and surface films. Children should investigate under what conditions objects sink or float, both in water and in other liquids. They should watch ice melt, and water freeze, and evaporate. They should also observe other substances that change state easily, such as candle wax and butter. And they should observe the wide range of chemicals that dissolve in water.
In their investigations, pupils should become aware of the ease with which certain liquids evaporate and of the danger of strong-smelling substances such as those from cleaning fluids and gasoline. They should experience the pleasure of playing in and around water, but they should also be made aware of the hazards(危险) and be taught to play safely.
Pupils must learn of society’s increasing demands upon fresh water and develop a healthy concern for how it is used. The amount of water on earth does not change; it is only recycled. What is used for pupils today is part of the same water used even by Columbus and Cleopatra!
Finally, pupils should come to appreciate the different kinds of methods by which fresh water is transported from the sea to land areas. They should know the potential(潜力) of the sea--for all practical purposes, the last frontier on earth--for additional fresh water, for food, and for chemicals. They also should understand the importance of the sea for transportation and recreation, as well as for its effect on weather.
The importance of the sea includes all of the following, except______.
选项
A、for transportation
B、for sanitation
C、for recreation
D、for additional fresh water
答案
B
解析
卫生指的是水,而不是海水的利用。
转载请注明原文地址:https://kaotiyun.com/show/k4td777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Accordingtothepassage,whichofthefollowingnewspapershavethelargestcirculation?
WilliamShakespearedescribedoldageas"secondchildishness"—noteeth,noeyes,notaste.Inthecaseoftastehemay,musical
PaulJohnson’sHistoryOfTheAmericanPeopleiswhatwehavecometoexpectfromthisproductivewriter—clear,colorfulnarrati
Inthepastdecade,newscientificdevelopmentsincommunicationshavechangedthewaymanypeoplegatherinformationaboutpoli
Whyisthestudyimportanttohuman?
Musicisanimportantwayofexpressingpeople’sfeelingsandemotions.The【C1】______,forinstance,from1960to1969willbe【C
Thewriterbecameawareofhermemoryproblemwhensherealizedthatshehad______.Thewriterateatastelessdietforsevera
Thewriterbecameawareofhermemoryproblemwhensherealizedthatshehad______.Itcanbeinferredfromthepassagethatg
Thepicnics,speeches,andparadesoftoday’sLaborDaywereallpartofthefirstcelebration,heldinNewYorkCityin1882.I
随机试题
()就是为某些高频汉字专门编订的,特定用于击打这些汉字的亚伟码。
客户选定商品后,就可以确认购买。此时,系统一般会提供()付款方式供用户选择。
You’dbettergonow,______you’llmissthenexttrain.
培养真菌的最适宜pH值是
金融市场个体投资者出现的心理和行为偏差主要有()。Ⅰ.处置效应Ⅱ.羊群行为Ⅲ.过度交易行为Ⅳ.本土偏差
一般资料:求助者,女性,32岁,公司职员,大学本科。案例介绍:求助者在一家大型外企从事人力资源管理工作,收入较高,工作得心应手,没有量化的业绩指标压力。丈夫为某高校副教授,有一女儿3岁,健康活泼,家庭幸福。求助者对自己的生活却不满意,常常自问:“
处于青少年期的小刚十分认同沙伊的智力适应理论,认为智力变化具有适应意义。根据沙伊划分的智力发展阶段,小刚的智力发展还要经历的阶段有()。
可以由全国人大罢免的国家领导人员有()。
已知实二次型f=(a11x1+a12x2+a13x3)2+(a21x1+a22x2+a23x3)2+(a31x1+a32x2+a33x3)2正定,矩阵A=(aij)3×3,则()
Necessarymeditationsontheactual,includingthemeanbread-and-cheesequestion,dissipatedthephantasmalforawhile,andco
最新回复
(
0
)