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

题目以下哪些说法是正确的（）。

A．由刘某、王某、韩某和赵某合作完成的一项发明创造，申请专利的权利属于该四人共有，他们不得约定申请专利的权利只属于王某

B．某企业以高额研发费用委托某设计院完成了一项发明创造，但双方未就该发明创造申请专利事宜作出约定，因此就该发明创造申请专利的权利属于该企业

C．张某主要利用其所在单位的物质技术条件完成了一项发明创造，且未与所在单位作出任何约定，因此就该发明创造申请专利的权利属于张某所在的单位

D．钱某临时借调到某研究所工作，在执行该研究所交付的任务过程中完成的发明创造属于职务发明创造