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
A、To learn how to prevent a bone disease. B、To understand differences between bone tissue and other tissue. C、To find out how sp
A、To learn how to prevent a bone disease. B、To understand differences between bone tissue and other tissue. C、To find out how sp
admin
2010-07-14
28
问题
W: Ok, last night you were supposed to read an article about human bones. Are there any comments about it?
M: Well, to begin with, I was surprised to find out there was so much going on in bones. I always assumed they were pretty lifeless.
W: Well, that’s an assumption many people make. But the fact is bones are made of dynamic living tissue that requires continuous maintenance and repair.
M: Right. That’s one of the things I found so fascinating about the article the way the bones repair themselves.
W: Ok. So can you tell us how the bones repair themselves?
M: Sure. See, there are two groups of different types of specialized cells in the bone that work together to do it. The first group goes to an area of the bone that needs repair. This group of cells produces the chemical that actually breaks down the bone tissue, and leaves a hole in it. After that the second group of specialized cells comes and produces the new tissue that fills in the hole that was made by the first group.
W: Very good. This is a very complex process. In fact, the scientists who study human bones don’t completely understand it yet. They are still trying to find out how it all actually works. Specifically, because sometimes after the first group of cells leaves a hole in the bone tissue, for some reason, the second group doesn’t completely fill in the hole. And this can cause real problems. It can actually lead to a disease in which the bone becomes weak and is easily broken.
M: Ok, I get it. So if the scientists can figure out what makes the specialized ceils work, maybe they can find a way to make sure the second group of cells completely fills the hole in the bone tissue ever time. That’ll prevent the disease from every occurring.
选项
A、To learn how to prevent a bone disease.
B、To understand differences between bone tissue and other tissue.
C、To find out how specialized bone cells have evolved.
D、To create artificial bone tissue.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/FaKK777K
0
大学英语六级
相关试题推荐
A、Studentsmightnotconsiderthemtobeanimportantpartofculture.B、Theysymbolizetherebellionofyouthinthe1950’s.C、
A、She’snotaverygoodcook.B、She’sannoyedwiththeman.C、Shedidn’tlikethefoodthemanprepared.D、Shethinksthemansh
InGermany,______.Whatisthepoliticalimplicationofthedemographicchangeinthedevelopedcountries?
ThecurrentruraldepopulationinEuropeistheresultoflong-termemigrationandindustrialization.Thedemographicchangein
A、Heisupset.B、Hefliesintoarage.C、Heisonlytoogladtogo.D、Heissureofhisfuture.D
A、Becausetheyaretoomeantotreatothers.B、Becausetheyaretooreservedtoexpressintimacy.C、Becausethatiswhatgentlem
A、Shedoesn’tlikepicnic.B、Itwillbetoohot.C、Shewillhaveanexamnextweek.D、Thebiologyclasswillgotothebeachne
A、Somecorrespondenceschoolshelppeopleearnalotofmoney.B、Somecorrespondenceschoolshelppeoplegetjobinbigcompanie
Runningaleverwasoncethoughttobetheprerogativeofwarm-bloodedcreatures,whoseinternaltemperaturesareindependentof
ThedevelopingcountriesofCentralandSouthAmerica,Africa,andAsiaoncemerelyexportedrawmaterialsandcashcropsinret
随机试题
下列亲属中,属于近亲属的是()。
Accordingtoa【B1】________,about25%ofcollegestudentshaveapart-timejob.Bytheupcomingsummervacation,thisfigurewil
触发器的一个重要作用是构成各种形式的计数器,用于记忆输入脉冲的幅度。()
三羧酸循环以乙酰CoA与草酰乙酸缩合成含有三个羧基的柠檬酸开始。故称为三羧酸循环。三羧酸循环中发生了唯一底物水平磷酸化,催化该步反应的酶是
在上市公司增资发行方式中,公司发行可转换债券的主要动因是()。
ItwasnotexactlyaperfectnightinWashingtonforFourthofJulyfireworksthisyear,whenfogandrainblanketedtheskyand
为什么说学校教育在个体身心发展中起主导作用?
“兼相爱,交相利”是中国历史上第一次思想大解放中理论最简洁、伦理色彩最浓厚的思想光华。建立在人性知恩图报感情基础之上的“爱人者必见爱也”的观点以人类利益相互满足为前提,用“相爱”来偃武止戈、谋取和平,与源自基督教教义的“博爱”有异曲同工之处,这使得墨子学说
当自变量的确造成了因变量的变化,而不是其他的因素造成了因变量的变化,我们就说这种因变量是()。
Ithasbeennecessarytoreferrepeatedlytotheeffectsofthetwoworldwarsinpromotingallkindofinnovation.Itshouldbe
最新回复
(
0
)