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、They defend the bone against viruses. B、They prevent oxygen from entering the bone. C、They break down bone tissue. D、They conn
A、They defend the bone against viruses. B、They prevent oxygen from entering the bone. C、They break down bone tissue. D、They conn
admin
2010-07-14
22
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、They defend the bone against viruses.
B、They prevent oxygen from entering the bone.
C、They break down bone tissue.
D、They connect the bone to muscle tissue.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/TaKK777K
0
大学英语六级
相关试题推荐
A、Hewon’tvoteforthewoman.B、Hemayalsorunforclasspresident.C、Heshouldpromisetosupportthewoman.D、Thewomanshou
Theexamplesofbirdsandfishareusedto______.WhichofthefollowingstatementsisTRUEaccordingtothepassage?
A、Inall,fortytechniciansweresenttothelaunch.B、Somespecializedtechniciansweresenttopreventaccidents.C、Allthete
A、Atalocalhospital.B、Inadepartmentstorewarehouse.C、Inanewlyinstalledhouse.D、Inarestaurant.CM:Everythingisnow
A、Localstories.B、Englishscenery.C、Anexcursion.D、Scottishfolklore.A
Themostinterestingarchitecturalphenomenonofthe1970’swastheenthusiasmforrefurbishingoldbuildings.Obviously,thisw
TheAmericaneconomicsystemisorganizedaroundabasicallyprivateenterprise,marketorientedeconomyinwhichconsumerslarg
A、Theyloveeachother.B、Theyhateeachother.C、Theyarenotverygoodfriends.D、Notofaboveall.C她和这些朋友关系只是一般,她的好朋友中没有参加妇女
A、Hehasfailedintheexam.B、Hehaslostinthegame.C、Hecouldn’trepresenthisteam.D、Thetrackmeethadbeencancelled.
Truancy(逃学)sweepsaroundBritainrecentlyrevealedthousandsofchildrenmissedschool—andturnedupsomeridiculousexcuses,
随机试题
以下作家作品搭配不正确的是()
色视野范围最大的是
半数结节病患者具有的唯一的异常征象是
引起肝脓肿最可能的病因是
A.5厘米B.10厘米C.15厘米D.30厘米药品批发企业中,药品与地面的间距不小于()
金蝶KIS标准版预设的核算项目有()。
中国古代丧葬方式主要有()。
某单位领导比较看好一位青年员工,经常指点并着重培养他,引起了其他员工的不满。此时,该领导最恰当的做法是()。
我国社会主义法制既保障人民的民主权利,使人民民主成为现实,又规范人民的民主行为,是因为()。
A、Ms.Smithbelievedthattheinvestmentproposalwouldhelp.B、Ms.Smithwasnotinfavoroftheinvestmentproposal.C、Ms.Smi
最新回复
(
0
)