2. 外语
  3. A. organs B. being changed C. fact D. process E. for F. reborn G. to H. shorten I. to change J. recovered K. of L. old M. length

A. organs B. being changed C. fact D. process E. for F. reborn G. to H. shorten I. to change J. recovered K. of L. old M. length

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问题 A. organs B. being changed C. fact D. process E. for
F. reborn G. to H. shorten I. to change J. recovered
K. of L. old M. lengthen N. reason O. remaining
    Throughout history man has had to accept the fact that all living things must die, but people now live longer than they used to. However, all living things still show the 【C1】______of aging, which will eventually result in death. Aging is not a disease, but as a person passes maturity, the cells of the body and the【C2】______they form do not function as well as they did in childhood and adolescence. The body provides less protection against disease and is more inclined【C3】______accident.
    A number of related causes may contribute to aging. Some cells of the body have a fairly long life, but they are not【C4】______ when they die. As a person ages, the number of brain cells and muscle cells decreases. The other body cells die and are replaced by new cells. In an aging person the【C5】______ cells may not be as viable or as capable 【C6】______growth as those of a young person. Another【C7】______in aging may be changes within the cells themselves. Some of the protein chemicals in the cells are known 【C8】______with age and become less elastic. This is why the skin of old people wrinkles and hangs loose. This is also the reason old people【C9】______in height.
    There are maybe other more important chemical changes in the cells. Some complex cell chemicals, such as DNA, store and pass on information that the cells need. Aging may affect this【C10】______ and change the information-carrying molecules so that they do not transmit the information as well.
【C2】
选项
答案A
解析 名词词义及逻辑判断题。题意：“体内的细胞及其所构成的器官不再像儿童和青少年时期那样功能良好。”此处“细胞”与“器官”连用最符合上下文逻辑。organ：器官；此意此处符合题意要求。
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