搜题请搜索小程序“爱下问搜题”
问题 单项选择题

2008年7月11日，平安人寿重庆分公司的工作人员为地震幸存者马元江送去了5.48万元保险理赔款。这里所说的保险属于（）

A.财政拨款

B.社会救济

C.商业保险

D.社会保险

答案

参考答案：C

单项选择题

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.

Which of the following would be the best title for this passage

A．The Problem of Aging

B．Social Structures

C．Economic Technology

D．Continuing Education
查看答案
不定项选择

如图所示，在O点放置一个正电荷。在过O点的竖直平面内的A点，自由释放一个带正电的小球，小球的质量为m、电荷量为q。小球落下的轨迹如图中虚线所示，它与以O为圆心、R为半径的圆（图中实线表示）相交于B、C两点，O、C在同一水平线上，∠BOC＝30°，A距离OC的竖直高度为h。若小球通过B点的速度为v，则下列说法正确的是

[ ]

A．小球通过C点的速度大小是

B．小球通过C点的速度大小是

C．小球由A到C电场力做功是mv2－mgh

D．小球由A到C机械能的损失是mg（h－）－mv2

查看答案