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
45
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
B
解析
转载请注明原文地址:https://kaotiyun.com/show/TXWd777K
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______.
Butinpreservingthebalancewehavetobeclearwheretheproblemactuallylies.Ofthetotalcarbondioxideemissionscaused
Recurrenteducationisdesignedforfull-timestudentstogainknowledgeoutsidetheirschoolstudy.
Asinternationalcommercegrows,thereisanamazingdevelopmentwhichisexpandingatever-increasingrate—businessontheInte
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
得出两总体的样本数据如下:甲(33,18,40,50,54,30,39);乙(48,17,24,22,38)。在秩和检验中,秩和是()
肺下界上升见于平静呼吸时正常肺下界位于肩胛线
营养不良早期诊断的可靠指标是
中国籍人李红出国多年后定居甲国(但并未入甲国籍),后与甲国一男子结婚并生一女,取名希瑞。李红同江苏老家省亲,住在其亲属家。甲国称李红在甲国参与毒品交易等犯罪活动,向中国提出了引渡的要求,两国之间无引渡条约。依中国《国籍法》、《出境入境管理法》、《引渡法》及
在进行桥梁承载能力检测评定时,有关作用及其组合在无特殊情况要求时,宜采用设汁荷载标准。()
通过期货交易形成的价格具有( )的特点。
适合于建立费用中心进行成本控制的单位是()。
法的社会作用中,执行社会公共事务的作用仅对统治阶级是有利的。()
1972年联合国教科文组织出版了(),从此终身教育在整个世界,尤其是发达国家,成为改革成人教育和学校教育并使之一体化的基本指导理论
Whomostlikelyisthespeakeraddressing?
最新回复
(
0
)