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
22
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/aiHd777K
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
Theword"threatened"inthefirstsentenceofthefirstparagraphcouldbebestreplacedbyAccordingtoPlumptre,theregion
WhichofthefollowingstatementsaboutHenryFordisNOTtrue?Thephrase"turningout"inthelastparagraphcouldbebestre
Whichofthefollowingreasonsdoesnotexplainthefactthat"knittingwasnolongeraskillworthpassingdownfrommotherto
Marketcanbeclassifiedaccordingtowhatissoldonamarketandhowgoodsaresold.Strictlyspeaking,"wants"referstopeo
ImproveComputer-researchSkillsLikemanycollegestudents,JoseJuarezcarriesaroundapocket-sizedcomputerthatletshi
ImproveComputer-researchSkillsLikemanycollegestudents,JoseJuarezcarriesaroundapocket-sizedcomputerthatletshi
Thedramadepictsthoseconditionsattheturnofthecentury.
HappyBirthdaytoYouThemainproblemindiscussingAmericanpopularcultureisalsooneofitsmaincharacteristics:itw
TakingaNapduringtheDayMedicalexpertssaymostAmericansdonotget【51】sleep.TheysaymoreAmericansneedtorestfo
随机试题
[*]
邮递员骑自行车从邮局到渔村送邮件,平常需要1小时,某天在距离渔村2千米处,自行车出现故障,邮递员只好推车步行至渔村,步行速度只有骑车的1/4,结果比平时多用22.5分钟。问:邮局到渔村的距离是多少千米?
女性生殖道结核的常见传播途径是
《中华人民共和国水法》规定:国家建立饮用水水源保护区制度。省、自治区、直辖市人民政府应当划定饮用水水源保护区,并采取措施,防止(),保证城乡居民饮用水安全。
环境影响评价的特点包括:法律强制性、()。
A市位于我国东南部沿海丘陵地区。北部为山区,中部为山前平原,南部为滨海平原。在周边城镇群中定位为滨海旅游城市。区域概况:该市周边分布有甲、乙、丙三个城市,其中甲市位于A市西侧,距A市约200km,为我国东南部沿海重要的港口城市,并已建成国际机场一座;乙市
张某2011年3月25日被吊销了导游证,根据《中华人民共和国旅游法》第一百零三条规定,以下说法正确的是()。
WilliamAppleton,authorofarecentbookentitledFathersandDaughters,believesthatitisawoman’srelationshipwithherfa
(2013上项管)标前会议也称为投标预备会,是投标人按投标须知规定的时间和地点召开的会议。以下关于标前会议有关文档的说法中,错误的是______。
Contrasttoresearchers’expectations,dysfunctionalfamilyrelationshipsandpoor【M1】______communicationstylesappeartoh
最新回复
(
0
)