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
51
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
Individual-to-groupcommunicationincludes______.[br]Thecompanylobbiesare
Thepassageasawholecanbestbecharacterizedaswhichofthefollowing?[br]
[originaltext]M:Hello.W:Hello.ThisisDr.Gray’soffice.We’recallingtorem
A—midfieldB—backfieldC—cheerteamD—shootE—cornerhall
Aninternationalcommitteeofdoctorssaysthatthenumberofcasesofbrain
我国近代最成熟的学制是_________。
有学者认为,西周确立了封建大一统,那么春秋战国诸侯争霸吞并就是对西周体制的否定。
下列历史事件按时间排序正确的一组是()。A.司马迁修《史记》—文景之治一王莽篡汉
炎性息肉A.肉芽组织增生 B.肉芽肿形成 C.纤维素渗出 D.黏膜上皮及间
关于不同类型的政权组织形式,下列说法中正确的是:()A.二元君主立宪制中君
最新回复
(
0
)