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
Throughout history man has had to accept the fact that all living things must die, but people now live longer than they 【C1】____
Throughout history man has had to accept the fact that all living things must die, but people now live longer than they 【C1】____
admin
2010-04-12
28
问题
Throughout history man has had to accept the fact that all living things must die, but people now live longer than they 【C1】______. Yet, all living things still show the【C2】______of aging, which will eventually【C3】______death.
Aging is not a disease, but as a person passes maturity, the cells of the body and the【C4】______they form do not function as well as they【C5】______in childhood and adolescence (青春期), The body provides less【C6】______against disease and is more inclined【C7】______accident.
A number of related causes may【C8】______aging. Some cells of the body have a fairly long life, but they are not【C9】______when they die. As a person ages,【C10】______of brain cells and muscle cells decreases.【C11】______body cells die and are replaced by new cells. In an aging person the【C12】______cells may not be as viable (能生存的)or as capable【C13】______growth as those of a young person.
Another【C14】______in aging may be changes within the cells【C15】______. Some of the protein chemicals in cells are known【C16】______with age and become less elastic. This is why the skin of the old people wrinkles and【C17】______. This is also the reason old people【C18】______in height. There may be other more important chemical changes in the cells. Some complex cell chemicals, such as DNA and RNA, store and【C19】______information that the cells need. Aging may affect this【C20】______and change the information-carrying molecules so that they do not transmit the information as well.
【C15】
选项
A、for themselves
B、by themselves
C、themselves
D、on their own
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/H8j7777K
0
大学英语四级
相关试题推荐
_____________(说到教育),themajorityofpeoplebelievethataperson’seducationisthemostimportantaspectofhislife.
WhenmenreturnedfromWorldWarIIandthepostwar"babyboom"began,Americansbegantomoveingreatnumberstothe【B1】______
Televisionisoneofthemostcommonlyseenentertainmentdeviceinpeople’sdailylife.Probablypeoplewillneverthinkabout
Thetermbiologicalclockisappliedtothemeans,whichlivingthings【M1】______adjusttheiractivitypatterns,withou
A、Becauseherfriendaskedhertobuyone.B、Becauseshewantedtobuyone.C、Becauseshewantedtogiveitasagifttoherfri
Singaporeiswellknownasamulti-racial,multi-culturalandmulti-religiousnation.Andthis【C1】______isgraduallybecoming
TestingTimesResearchersareworkingonwaystoreducetheneedforanimalexperiments,butnewlawsmayincreasethenumbe
A、Thedeclineinhishealth.B、Hisdesiretostarthisownbusiness.C、Thecrisisinhisfamilylife.D、Hisdreamoflivingint
______(直到失去健康)thatpeopleknowthevalueofhealth.
Wemayallliketoconsiderourselvesfreespirits.Butastudyofthetracesleftby50,000cellphoneusersoverthreemonthsh
随机试题
水肿首先出现于身体下垂部位,多见于
患者女,26岁,农民。因无明显诱因出现烦躁、焦虑、抑郁、怀疑被人议论和被害5个月,2月前出现四肢近端阵发性发绀,腕、足、踝关节红、肿、热、痛并指端发麻,进行性出现皮肤变黑、色素沉着、双侧颜面部呈对称性皮疹,口唇色素沉着并增厚,面部及四肢皮肤红斑、脱发,间歇
善于治痰多咳喘气急,兼能润肠通便的是
“物之所在地法”为常见的国际私法冲突规范中的系属公式,在涉外物权法律适用中,不能适用该系属公式的情形为:()
计算机网络中,LAN网指的是()。
下列账户的明细账账页格式应采用三栏式的是( )。
当旅游团内出现纠纷,全陪或领队与旅游者之间产生矛盾时,地陪应及时介入,合理协调。()
某银行资金交易部最新报告指出,从国内宏观调控的需要看,只有人民币持续不断地加息,才能从根本上控制经济扩张的冲动,避免资产泡沫的出现和破灭;如果人民币不加快升值,那么人民币流动性无法根治,利率偏低的状况无法纠正,资产泡沫就有可能越吹越大。据此,可以
甲、乙在离婚时约定,任何一方在离婚后不得再婚。该约定属于()。
Howeverimportantwemayregardschoollifetobe,thereisnodenyingthefactthatchildrenspendmoretimeathomethaninth
最新回复
(
0
)