题目内容
It happens to us all, however hard we may try to delay the process—we grow old. Surgery may remove wrinkles (皱纹), skin which has become less firm may be tightened by a surgical operation on the face, and hair-dressers may dye grey hair a more youthful color, but we cannot remain young forever. Advances in medicine have made it possible for more people to stay alive longer. However, what is important is the quality of life, and people age differently. Some people remain quite well and able to look after themselves when they get old, but others of the same age are not so lucky. They have to go into a nursing home in order to receive adequate care. The worst aspect of ageing is that often the mind becomes less alert. As people grow older, they often experience loss of short-term memory, although they may well be able to recall quite easily events that happened long ago. Later they may suffer from dementia (痴呆), a disease which gets gradually worse. By no means all elderly people are in this category. Many senior citizens are in possession of all their faculties and see retirement as a time of freedom. Not only that, if they have a generous retirement pension, they are likely to be quite well off, with money to spend on holidays and other luxuries. Because of this, both businesses and government have a new respect for what is known as grey power. By no means, however, does everyone treat OAPs with respect. There are some culture which are noted for the great respect with which they treat their old people, but many people in other cultures regard the old people as having a very low status in society and treat them accordingly. They often consider old people as having one foot in the grave. Someone should remind them that they, too, will be old one day. Elderly people who cannot look after themselves go to ______.
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辨析题：发现学习一定优于接受学习。
Ants first captured the attention of software engineers in the early 1990s. A single ant cannot do much on its own, but a group of ants (51) can solve complex problems. That inspired people like Marco Dorigo, who is one of the founders of a (52) known as group intelligence. Ants are good at choosing the shortest possible route between a food (53) and their nest. This reminds us of a classic computational travelling-salesman problem. Given a list of cities and their (54) apart, the salesman must find the shortest route needed to visit each city once. As the number of cities (55) , the problem gets more complicated. Ants solve their own problem using chemical signals called pheromones (信息素), when an ant finds food, she takes it back to the nest, (56) a pheromone trail that will attract others. The more ants that (57) the trail, the stronger it becomes. (58) , the pheromones evaporate (挥发) quickly, so once all the food has been collected, the trail soon goes cold. This rapid evaporation means long trails are less (59) than short ones, all else being equal. Pheromones thus turn the (60) intelligence of the individual ants into something more powerful.
It happens to us all, however hard we may try to delay the process—we grow old. Surgery may remove wrinkles (皱纹), skin which has become less firm may be tightened by a surgical operation on the face, and hair-dressers may dye grey hair a more youthful color, but we cannot remain young forever. Advances in medicine have made it possible for more people to stay alive longer. However, what is important is the quality of life, and people age differently. Some people remain quite well and able to look after themselves when they get old, but others of the same age are not so lucky. They have to go into a nursing home in order to receive adequate care. The worst aspect of ageing is that often the mind becomes less alert. As people grow older, they often experience loss of short-term memory, although they may well be able to recall quite easily events that happened long ago. Later they may suffer from dementia (痴呆), a disease which gets gradually worse. By no means all elderly people are in this category. Many senior citizens are in possession of all their faculties and see retirement as a time of freedom. Not only that, if they have a generous retirement pension, they are likely to be quite well off, with money to spend on holidays and other luxuries. Because of this, both businesses and government have a new respect for what is known as grey power. By no means, however, does everyone treat OAPs with respect. There are some culture which are noted for the great respect with which they treat their old people, but many people in other cultures regard the old people as having a very low status in society and treat them accordingly. They often consider old people as having one foot in the grave. Someone should remind them that they, too, will be old one day. According to the author, how people threat the elderly relates to ______.
试述上皮细胞侧面都有哪些细胞连接？（2分）
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