首页
登录
职称英语
Throughout history man has had to accept the fact that all living things mus
Throughout history man has had to accept the fact that all living things mus
游客
2023-07-25
48
管理
问题
Throughout history man has had to accept the fact that all living things must die, hut people now live longer than they used to. Yet, all【C1】______things still show the effect of aging, which will eventually【C2】______death. The body and the【C3】______, they do not function as well as they【C4】______in childhood and adolescence(青春期). The body provides less【C5】______against disease and is more prone(易于……的)【C6】______accident.
A number of related causes may【C7】______to aging. Some cells of the body have a【C8】______long life, but they are not【C9】______when they die. As a person ages,【C10】______of brain cells and muscle cells decreases. Other body cells did and are replaced by new cells. In an aging person the【C11】______cells may not be as viable(能生存的)or as capable【C12】______growth as those of a young person.
Another factor in aging may be changes within the cells【C13】______Some of the protein chemicals in cells【C14】______known to change【C15】______age and become less elastic. This is why the skin of old people wrinkles and hangs loose. This is also the reason old people shrink in【C19】______. There may be other more important chemical changes in the cells. Some complex cell chemicals.【C17】______DNA and RNA, store and【C18】______information that the cells need. Aging may【C19】______this process and change the information carrying molecules【C20】______they do not transmit the information as well. [br] 【C14】
选项
A、is
B、are
C、was
D、were
答案
B
解析
主语some of the protein chemicals为复数;而且,从后中句become中得到提示,用一般现在时,描述一种客观规律。
转载请注明原文地址:https://tihaiku.com/zcyy/2866854.html
相关试题推荐
Althoughthepossibilityoflivingalongandhappylifenowadaysisgreater
Althoughthepossibilityoflivingalongandhappylifenowadaysisgreater
Althoughthepossibilityoflivingalongandhappylifenowadaysisgreater
Althoughthepossibilityoflivingalongandhappylifenowadaysisgreater
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthe
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthe
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthe
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthe
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthe
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthe
随机试题
WhydidFrenchofficialmeetwithUnionandstudentleaders?[br][originaltext
ThemoleculesofcarbondioxideintheEarth’satmosphereaffecttheheatb
[originaltext]IncoldandsnowyAlaska,there’savillagecalledTakotna.I
女性,34岁,面部痤疮1年,逐渐加重,伴多毛,内分泌检查示睾酮增高,最适合选用的
共用题干 甲男于2008年7月经人介绍与乙女相识。相识不久,甲男向乙女提出想尽
Thechangeinthatvillagewasmiraculou
投资性房地产后续计量模式包括成本模式和公允价值模式两种模式,同一企业可以同时采用
(2018年真题)净现值可直接用于寿命期不同的互斥投资方案的决策。()
风机盘管机组进场后应进行见证抽样复试,不包括的复试参数是()。A.噪声 B.
股骨颈囊内骨折较为严重的后期并发症是A.髋关节屈曲畸形 B.下肢短缩畸形 C
最新回复
(
0
)