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
25
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、Itchangesthebody’smetabolismthroughrapidweightgain.B、Ittricksthebodyintorespondingasifitwereinadifferent
Themainideaofthefirstparagraphisthatimportanceshouldbeattachedtothesystematicstudyof______.Westernersaref
A、AyatollahRuhollahKhomeini.B、KamalKharrazi.C、TonyBlair.D、SalmanRushdie.AWhowasthelateIranianleaderaccordingtot
A、Traininggiventomusictherapists.B、Howmusicpreventsdisease.C、Studiesonthebenefitsofmusic.D、Howmusicianscreatem
A、Becausetheywanttoearnhighsalary.B、Becauseschoolsdonotteachstudentshowtochoosejobs.C、Becausetherehasbeense
Whichonewillhelppeopletorecognizetheirownkeyrequirementsduringhuntingajob?WhenwillKellycontactyouonceyouh
"ThisIsYourBrainonMusic"Neuroscientist(神经系统科学家)DanielLevitin’swonderfulnewbookexplainswhymusicisacritical
A、Weneedourfriendstosharesimilarinterestsandactivities.B、Weneedourteacherstoguideus.C、Weneedco-workerstohe
A、Becauseheneededmoney.B、Becausethecarwouldnotgoatall.C、Becausethecarbrokedowntoooften.D、Becausethecarcoul
PartyRandomThoughtsLastnight,pressuredbywell-intentionedfriends,forthefirsttimeinmonths,Icameoutofwriter’
随机试题
Thedoghasoftenbeenanunselfishfriendtoman.Itisalwaysgratefultoitsmaster.Ithelpsmaninmanyways.Certainbreed
6个月男孩,发热、腹泻3d就诊,体温38.5℃~40℃(肛表),大便10~15次/天,为黄色稀水样,量中等,有时有呕吐。体检:患儿较烦躁,哭无泪,尿量很少,下面哪组检查最合理和急需
低钾血症是指血清钾低于
具有温肾散寒、涩肠止泻功效的中成药是
量测钢筋混凝土内部钢筋应力采用()。
可燃气体、易燃、可燃液体和可熔化固体火灾宜采用()。
E企业2002年1月1日发行5年期长期债券,其面值为100000元,年利率为10%,每半年付息一次,发行价格为92640.50元。如果采用直线法摊销折价,则每年应计入“财务费用”科目的金额包括()。
现场审计主要包括()三个方面。
“凡是发生在本国领域内的犯罪,不论犯罪人是本国人还是外国人,均适用本国刑法。”其确定刑法管辖权的原则是
设为正定矩阵,令P=证明:D=BA一1BT为正定矩阵.
最新回复
(
0
)