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
73
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.
According to the passage water is important for all of the following, except______.
选项
A、early international trade
B、the most common substance in living plant and animal tissues
C、hydroelectric power stations
D、sanitation and recreation
答案
A
解析
B、C、D见第一段第二、四、五句,都是水的重要用途。而Aearly international trade 和水没有必然的联系。
转载请注明原文地址:https://kaotiyun.com/show/N4td777K
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
Whatkindofproofdidthemanprobablyhavewhenheboughttheradio?
Sincethedawnofhumaningenuity,peoplehavedevisedevermorecunningtoolstocopewithworkthatisdangerous,boring,burd
TheInternetandmobilephoneshavetransformedourconnectionstopeoplearoundtheworld.Thistechnologyhasalso,however,l
Advancesininterfaces—thephysicalwaywereactwithcomputers—andothertechniquesofcontrollingcomputerswillsupplementth
It’salmostanarticleoffaith:yourbestallyinthefightagainstcancerisadoggedlyoptimisticoutlook.Anditwouldseem
WilliamShakespearedescribedoldageas"secondchildishness"—noteeth,noeyes,notaste.Inthecaseoftastehemay,musical
PaulJohnson’sHistoryOfTheAmericanPeopleiswhatwehavecometoexpectfromthisproductivewriter—clear,colorfulnarrati
Musicisanimportantwayofexpressingpeople’sfeelingsandemotions.The【C1】______,forinstance,from1960to1969willbe【C
Whatproblemdoesthemanhave?
Thepicnics,speeches,andparadesoftoday’sLaborDaywereallpartofthefirstcelebration,heldinNewYorkCityin1882.I
随机试题
头颈部肿瘤术前放疗的合适剂量为
扩散加权成像和灌注加权成像主要的临床应用是
王甲要运送一批货物给收货人李丙,王甲委托自己的弟弟王乙代自己履行,王乙也因为临时有事就委托自己的同学章定代为运送。谁知在运送途中,章定遇见自己的朋友,两人遂同去喝酒,章定不胜酒力致该批货物遗失。李丙也因未能及时收到货物而发生损失。现问,李丙应向谁要求承担损
价值工程的主要特征着眼于提高价值,即以( )实现必要的功能。
某工程,建设单位与施工单位按照《建设工程施工合同(示范文本)》(GF—99—0201)签订了施工承包合同。合同约定:工期6个月;A、B工作所用的材料由建设单位采购;合同价款采用以直接费为计算基础的全费用综合单位计价;施工期间若遇物价上涨,只对钢材、水泥和骨
企业年金的投资范围包括()。
ABC会计师事务所的A注册会计师负责审计上市公司甲公司2013年度财务报表。下列各项中,A注册会计师可以以口头形式与甲公司治理层沟通的是()。
教师通过创设良好的环境和利用自身的教育因素,对学生进行熏陶和感染,以培养学生良好思想品德的德育方法是()。
王村小学举行数学竞赛,共10道题。每做对一道题得10分,每做错一道题扣减2分。小明得了64分。他做错了几道题?()
下面是关于树和线性结构的描述:线性结构存在惟一的没有前驱的(14),树存在惟一的没有前驱的(15);线性结构存在惟一的没有后继的(16),树存在多个没有后继的(17);线性结构其余元素均存在(18),树其余结点均存在(19)。由此可见,由于线性结
最新回复
(
0
)