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、It breaks down the bone tissue. B、It produces the new tissue. C、It fills in the bone holes. D、It completely repairs the bones.
A、It breaks down the bone tissue. B、It produces the new tissue. C、It fills in the bone holes. D、It completely repairs the bones.
admin
2019-09-18
83
问题
W: You’ve read an article about human bones. Are there any comments about it?
M: I was surprised to find out there was so much going on in bones. I always assumed they were pretty lifeless.
W: In fact, 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: Can you tell us how the bones repair themselves?
M: Sure. 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.
W: Well said, what about the second group?
M: 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. It can 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 cells work, maybe they can find a way to make sure the second group of cells completely fills the hole in the bone tissue.[8] That’ll prevent the disease from ever occurring.
5 What are the two speakers mainly talking about?
6 What is the function of the first group of specialized cells?
7 What does the woman say about scientists who study the specialized cells in human bones?
8 What benefit will it bring if scientists find out what makes the specialized cells work?
选项
A、It breaks down the bone tissue.
B、It produces the new tissue.
C、It fills in the bone holes.
D、It completely repairs the bones.
答案
A
解析
①从各选项可以推断问题问的是It的作用,It此处指的是第一个细胞群。②在谈论骨骼的两个不同的特殊细胞群时,女士指出第一个细胞群能够产生一种化学物质,破坏骨组织,并且在上面留下一个洞。故选A。
转载请注明原文地址:https://kaotiyun.com/show/HAW7777K
0
大学英语六级
相关试题推荐
Forthispart,youareallowed30minutestowriteanessayonuniversitystudents’physicalhealth.Youressayshouldfocuson
A、Itletsblindpeopleexperiencefamouspaintings.B、ItiscalledAccesstoMuseumsforBlindandVisuallyImpairedpeople.C、I
Inlastyear’sSciencestudy,researchersatJohnsHopkinsUniversityexaminedtherelationshipbetweenstem-celldivisionsand
20世纪70年代,中国人曾以有一件外国衬衣和一块进口电子手表而感到无比自豪。那时候,国产商品在外观和功能方面都远远逊色于外国品牌产品。“崇洋媚外”在中国消费者心理上打下了烙印。随着中国现代化科技和经济的发展,中国综合国力的提升,如今的国
Peoplecannowavoidhavingtosortthroughalbumsfromseveraldifferentfriendswhentryingtoreliveparties,weddingsandot
Somesayitisevidentthatcomputerscandamageaperson’seyesight.Sincethepopularityofcomputersbegantoskyrocket,ther
Whilethemissionofpublicschoolshasexpandedbeyondeducationtoincludesocialsupportandextra-curricularactivities,the
TheotherdayIwaslisteningtoaChristianradioprogramonthewaytothegym.Eachdaytheyaskaquestionfortheirlistene
Forthispart,youareallowed30minutestowriteashortessayentitledOnLivingtheSOHOLifestyle.Youshouldwriteatleas
Innovation,theeffectiverecipeofprogress,hasalwayscostpeopletheirjobs.Overthepast30yearsthedigitalrevolutionh
随机试题
以下关于退休规划表述正确的是()。
L国某公司是一家食品生产企业,其产品的主要原材料需要大量进口,为了降低成本,该公司决定在S国投资建立全资子公司,获得该国低廉的劳动力以及原材料。该公司在该国收购原材料,然后加工成半成品,最后由全资子公司向L国母公司出口。该公司进入国外市场的模式属于(
叶某创作《星光灿烂》词曲并发表于音乐杂志,郝某在个人举办的赈灾义演中演唱该歌曲,南极熊唱片公司录制并发行郝某的演唱会唱片,星星电台购买该唱片并播放了该歌曲。问:郝某演唱《星光灿烂》是否应征得叶某同意并支付报酬?为什么?
关于石蜡的准备和清洁,错误的是
哺乳动物神经细胞间信息传递主要靠
[1995年第074题]下列哪项不属于高层建筑?
某室外220kV变电站,地处海拔1000m以下,其高压配电装置的变压器进线间隔断面图如下图所示。该变电站母线高度11.0m,母线隔离开关支架高度2.7m,母线隔离开关本体(接线端子距支架顶)高度2.6m,要满足在不同气象条件的各种状态下,母线引下线
真空预压处理软基施工中,可停止抽气的条件有()。
以下选项中不属于《普通高中语文课程标准(实验)》实施建议中“教学建议”的内容的一项是()。
WhatisthemostimportanteconomicactivityinCanada?
最新回复
(
0
)