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 a kind of chemical substance.
Water is a kind of chemical substance.
admin
2011-01-02
25
问题
Water is a kind of chemical substance.
Every year there are reports of people dying as the result of extremely hot weather.Many of the victims are old persons,whose hearts or breathing systems decline.But many die from lack of water.
Water is necessary for life and good health.We often forget this fact when we think about the other building blocks of life such as vitamins,minerals and proteins.We can live for many days without eating,but two or three days without water usually leads to death.
The human body may look solid.but most of it is water.New born babies are as much as 85% water.Women are about 65% water and men about 75%.Women usually have less water than men because women,in general,have more fat cells.and fat cells hold less water than other kinds of cells.
Water does many different things to keep us healthy.It carries hormones,antibodies and foods through the body,and carries away waste materials.That is why different parts of the body contain different amounts of water.For example.blood is 83% water.muscles are 75% water,the brain is 74%.and bones are 25%.
Water is also necessary for cooling the body under hot weather and when we are working hard or exercising,water carries body heat to the surface of the skin,where the heat is lost through perspiration.Researchers say cool liquids cool us faster than warm liquids,because cold liquids take up more heat inside the body and carry it away faster:They say,however,that cold sweet drinks do not work well because the sugar slows the liquid from getting into the blood-stream.
Researchers also note that fat cells block body heat from escaping quickly.Fat cells under the skin act like warm clothing to keep body heat inside.This is why overweight people have a more easy time staying cool than thin people.
The body loses water every day through perspiration and urine.If we lose too much.we will become sick.A 10% drop in body water can cause the blood system to fail.A 15%~20% drop usually leads to death.To replace what is lost,health experts say growing persons should drink about 2 liters of liquids each day,and more in hot weather.They say we can also get some of the water we need in the foods we eat.Most fruits and vegetables are more than 80% water.Meats are 50%~60% water.And even bread is about 33% water.Water may be one of the most simple of all chemical substances,but it is the most important substance that we put into our bodies.
选项
A、Right
B、Wrong
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/iiHd777K
本试题收录于:
公共英语五级笔试题库公共英语(PETS)分类
0
公共英语五级笔试
公共英语(PETS)
相关试题推荐
A.RewardsfollowingtheUSfinancialinjection.B.Mir’sfirstsinscientificexperimentsandspaceexploration.C.UndeniableMir
Howlongdidtheauthorwanderaboutinthestreetsbeforehestoppedunderabridge?Accordingtotheauthor,whatisthebest
StarQualityAnewanti-cheatingsystemforcountingthejudges’scoresiniceskatingisflawed,accordingtoleadingsportssp
ImproveComputer-researchSkillsLikemanycollegestudents,JoseJuarezcarriesaroundapocket-sizedcomputerthatletshi
ImproveComputer-researchSkillsLikemanycollegestudents,JoseJuarezcarriesaroundapocket-sizedcomputerthatletshi
HappyBirthdaytoYouThemainproblemindiscussingAmericanpopularcultureisalsooneofitsmaincharacteristics:itw
Whatdidthespeakertalkaboutlasttime?
Waterisakindofchemicalsubstance.
Waterisakindofchemicalsubstance.
随机试题
双击资源管理器窗口标题栏可以完成窗口的最大化和还原的切换。()
对于函数y=,下列结论中正确的是()
男性,28岁,哮喘急性发作已经2天,患者和家属情绪十分紧张。根据动脉血气分析结果,医生认为病情尚不严重,劝告患者及其家属不必过于紧张。血气分析除轻度低氧血症外,医生做出病情估计是根据下列指标中的
法律作为一种社会规范,产生于人类社会自身的需要,但是通过法律的施行和法律的社会作用,法律也会对社会的运行产生重要的影响,法律是社会运转的一种重要调整机制。法律对社会的调整主要表现在下列哪些方面?
《建筑抗震设计规范》中规定框架一抗震墙结构的抗震墙厚度不应小于:
建设工程项目管理有多种类型,不同利益方的项目管理(业主方和项目参与各方)的进度控制的______和时间范畴并不相同。
某厂生产白水泥,对每一窑生产的水泥都需要测定其抗压强度,以确定水泥标号,一般是将水泥出窑后做成的试块养护28天所测得的数据为准。但是水泥不可能堆放28天后再出厂,所以考虑用7天的抗压强度x来预测28天的抗压强度y。现在统计了26窑的数据,求得的结果为:=2
在社会公众的强烈呼吁下,近年来国务院下属部门向社会公开其“三公”经费及财政拨款情况。公众关注“三公”经费在内的财政预算公开惰:况,体现的公民权利是()。①对公共事务的知情权②对国家机关的监督权③直接参与公共事务的决策权④对公共服务的质询权
3月31日,殷雪梅老师在一辆狂奔而至的车辆面前,奋不顾身地用身躯护住路过的学生,从“虎口”下夺回了六七位小朋友的生命,而她却被车辆撞飞25米远,最后光荣牺牲。她是江苏省金坛市城南小学有近30年教龄的先进教育工作者。请结合这一案例,谈谈你对关爱学生的理
Completethesummarybelow.WriteNOMORETHANTHREEWORDSforeachanswer.MajorProblemsofaCompanySincethecompanyopened
最新回复
(
0
)