环境的承裁能力是有限的，读图5“环境负担公式”和“我国人口与耕地变化图
完成15—16题。
小题1:图中最能反映我国近50年来人口与耕地的环境负担在加重的是
A．耕地面积在减少
B．总人口数在增加
C．人均耕地在减少
D．耕地环境没有出现负担小题2:从“环境负担”公式中可以看出、创造财富技术水平的提高能减轻环境负担，下列措施能因此减轻人口与耕地环境负担的是
A．开发湿地、滩涂等易耕土地，扩大耕地面积
B．调整农业生产结构，增加粮食种植面积
C．推广良种，提高亩产
D．提高粮食进口量，缓减我国人口对土地的压力
小题1:C
小题2:C
本题考查环境承载力和资料综合分析能力。
小题1:人均耕地减少使人口与耕地的环境负担加重。
小题2:创造财富技术水平的提高，能减轻环境负担；推广良种，提高单位面积的产量，能减轻人口与耕地的环境负担。
| Modern industrial society grants little status to old people. In fact, such a society has a system of built-in obsolescence. There is no formal system for continuing our education throughout our life in order to keep up with rapidly changing knowledge. When our education and job skills have grown obsolete, we are treated exactly like those who have never gained an education or job skills and are not encouraged or given the opportunity to begin anew. As a society becomes more highly developed, the overall status of older people diminishes. Improved health technology creates a large pool of old people, who compete for jobs with the young. However, economic technology lowers the demand for workers and creates new jobs for which the skills of the aged are obsolete, forcing older people into retirement. At the same time, young people are being educated in the new technology and are keeping pace with rapid changes in knowledge. Finally, urbanization creates age-segregated neighborhoods. Because the old live on fixed incomes, they must often live in inferior housing. All these factors -- retirement, obsolete knowledge and skills, inferior standards of living -- lower the status of the aged in society. A century ago, when one could expect to live only to 50 or so, the life span more or less coincided with the occupation and family cycle. But today the average life span allows for fifteen to twenty years of life after these cycles. It appears that our life span is outpacing our usefulness in society. |
It can be deduced from this passage that one should______.
A．learn new skills
B．be open-minded
C．have a good personality
D．keep pace with the times