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
2019-10-21
62
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://kaotiyun.com/show/ivWd777K
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
WhereisthesocializingdonetraditionallyfortheUKyoungpeople?
Humanrelationshavecommandedpeople’sattentionfromearlytimes.Thewaysofpeoplehavebeenrecordedininnumerablemyths,
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
Theyaretalkingabouttheproblemsofoldpeopleingeneral.
______hotweathermaycauseserioushealthproblemsassociatedwithairpollution?______thedeadlyheatwavecankillpeople?
Withunfamiliarhumanbeings,whenweacknowledgetheirhumanness,wemustavoidstaringatthem,andyetwemustalsoavoidign
随机试题
Inthemidstofaperiodofrapidlanguageextinction,withalanguageestimatedtodieeverytwoweeks,linguistshavefounda
美国州与地方政府的关系为()
男性,18岁。反复发作阵发性干咳2年,寒冷天气发作更频。今天发作时频频干咳,呼气时可闻干啰音,肺功能FEV1/FVC为预计值的60%,IgE水平正常。下列哪项治疗较为合适
气瓶附件是气瓶的重要组成部分,对气瓶安全使用起着非常重要的作用。下列关于气瓶附件的说法中,正确的是()。
北京某广告代理公司已被认定为增值税一般纳税人。2014年7月,该公司取得广告制作费800万元(含税),支付给山西某媒体的广告发布费为400万元,所取得的发票为合法有效凭证。已知,当期该广告公司可以抵扣的进项税额为15万元,该广告公司适用的增值税税率为6%。
假定A公司正在对一个项目进行评价,在估计项目风险时找到一个类似公司B,B公司为一家上市公司,其股票的β值为2,资产负债率为50%,所得税率为33%。A公司的资产负债率为60%,所得税率为30%,则A公司该项目的股东权益β值为1.7521。(
关于医师干涉权的理解,正确的是()。
手机越来越成为人们必不可少的通信设备,我国手机市场上,既有苹果、三星等国外大品牌,也有华为、中兴等我国自主研发的品牌。下列因素中,不可能使我国的消费者享受更低手机价格的是()。
在一堂初中地理课上,来听课的老师问了学生们一个问题:“在地上挖了一个1000千米深的洞,这个洞底比上面热还是冷?”全班鸦雀无声,没人能回答。讲课的老师走了出来说道:“你提问的方式不对,让我来换一种问法,大家就知道了。同学们,地球的深层处于什么状态?”学生们
______theclaimaboutGermaneconomicmight,itissomewhatsurprisinghowrelativelysmalltheGermaneconomyactuallyis.
最新回复
(
0
)