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
51
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/JXWd777K
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
______providesexercisesforwriting?______doesnotsuggestthestudentsusedictionaryintheclass?
WorldleadersmetrecentlyatUnitedNationsheadquartersinNewYorkCitytodiscusstheenvironmentalissuesraisedattheRio
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
Theworryaboutsaltisthatitmay(31)highbloodpressure.Chemically,salt(32)ofsodiumandchlorideions,bothof(33)ar
Theworryaboutsaltisthatitmay(31)highbloodpressure.Chemically,salt(32)ofsodiumandchlorideions,bothof(33)ar
随机试题
IntheUnitedStatesandCanada,aprom,shortforpromenade,isaformaldance,orgettingtogetherofhighschoolstudents.It
根据我国《物权法》的规定,以公司债券进行质押的,质权设立的时间是()。
患者,男,52岁,肝硬化6年,有少量腹水,口服呋塞米及螺内酯片,近几日在家中口服蛋白粉。今日上午家属发现其表情淡漠,回答问题准确,但吐字不清,急诊医生初步诊断肝性脑病,其发病诱因为
散射线的产生,主要来自于
急性尿潴留时最常用的处理方法是
企业法律顾问参与企业重大经营决策的主要作用是保证决策的合法性和法律上的可行性,下列选项中体现这一作用的有()。
“备案号”栏应填()。“标记唛码及备注”栏应填()。
关于同一控制下企业合并的处理中,以下表述不正确的是()。
王某拾到李某丢失的钱包,当李某向王某讨还时,王某拒不归还,二人由此形成的债权关系是()。
A、条件(1)充分,但条件(2)不充分B、条件(2)充分,但条件(1)不充分C、条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分D、条件(1)充分,条件(2)也充分E、条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联
最新回复
(
0
)