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
2018-03-16
59
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 a-bout75%. 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、TRUE
B、FALSE
答案
A
解析
转载请注明原文地址:https://www.kaotiyun.com/show/FXWd777K
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
DoesthepublisherofDouglasStarr’sexcellentBlood—AnEpicHistoryofMedicineandCommerceactuallyexpecttosellmanyco
WhatdidCosgrovedobeforehebecameateacherteachinghistory?Onthewaytoschool,Cosgrove______.
Asinternationalcommercegrows,thereisanamazingdevelopmentwhichisexpandingatever-increasingrate—businessontheInte
Asinternationalcommercegrows,thereisanamazingdevelopmentwhichisexpandingatever-increasingrate—businessontheInte
Theworryaboutsaltisthatitmay(31)highbloodpressure.Chemically,salt(32)ofsodiumandchlorideions,bothof(33)ar
Theworryaboutsaltisthatitmay(31)highbloodpressure.Chemically,salt(32)ofsodiumandchlorideions,bothof(33)ar
Theworryaboutsaltisthatitmay(31)highbloodpressure.Chemically,salt(32)ofsodiumandchlorideions,bothof(33)ar
Theworryaboutsaltisthatitmay(31)highbloodpressure.Chemically,salt(32)ofsodiumandchlorideions,bothof(33)ar
WhatcanweconcludefromparagraphsoneandtwoaboutAmericabetween1994and1997?InWashingtonD.C.apassengerwasarrest
随机试题
什么是平面划线?什么是立体划线?
Ifwetakeacloselookatsuccessfullanguagelearners,wemaydiscoverafewtechniqueswhichmakelanguagelearningeasierfo
关于卵巢肿瘤,错误的是下列哪项
《期货从业人员执业行为准则(修订)》对期货从业人员()作了规定。[2013年3月真题]
履行地点不明确,交付不动产的,在()履行。
甲、乙订立承揽合同,甲提供木料,乙为其加工家具。在乙已完成加工工作的50%时,甲通知乙解除合同。根据合同法律制度的规定,下列表述中,正确的是()。
(2010下网规)乙公司中标承接了甲机构的网络工程集成项目,在合同中约定了因不可抗力因素导致工期延误而免责的条款,其中不被甲机构认可的一种因素是______(1)。合同约定,甲乙双发一旦出现分歧,在协商不成时,可提交到相关机构裁定,一般优先选择的裁定机构是
Thepassageisprimarilyconcernedwithdiscussing______Whichofthefollowing,iftrue,wouldbemostusefulinsupportingth
WhenIwasachildinBrainItaly,hardlyanymothershadajob,grandmotherslivedwiththeirchildrenandgrandchildren,and
IfthepopulationoftheEarthgoesonincreasingatitspresentrate,therewill【B1】______notbeenoughresourcesleftto【B2】_
最新回复
(
0
)