Throughout history, man has had to accept the fact that all living things mu

游客2023-07-11  32

问题     Throughout history, man has had to accept the fact that all living things must die, but 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【C16】______. 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] 【C7】

选项 A、contribute
B、compare
C、strength
D、be drown

答案 A

解析 contribute to有助于,促成;contribute一词后常跟介词to,表示对某方面作贡献。compare后可接to或with,表达略有不同,compare to把……比作……,例:The poet compares the woman to rose,诗人把女人比作玫瑰。compare with"……与……相比,例:If you compare me with my brother,you…如果你把我同我哥相比的话。be drawn to (sth.)为……吸引,喜欢。本文中的本句可看作为主题句,“很多原因可致使衰老”,后面具体叙说,因此,由后面文章内容可推断本空应选择A。
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