我国对可采煤层按厚度分为()、()、()和()四种类型。

题型:填空题

问题:

我国对可采煤层按厚度分为()、()、()和()四种类型。

考点:地质工考试矿山地质工矿山地质工题库
题型:填空题

任何( )开发不仅是对环境的破坏,在经济上也是不合算的。

A.适度

B.过度

C.有计划

D.无计划

题型:填空题

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.

According to the first paragraph, which of the following is true

A.People don’t have to gain education.

B.People don’t have to learn job skills.

C.People don’t have to be treated as equals.

D.People don’t have chances to begin anew.

题型:填空题

在程序设计中,计算机辅助设计又叫(),已逐渐代替人工设计,极大地提高了设计的质量和效率。

题型:填空题

打手与尘棒间的排杂情况包括:()、()和()。

题型:填空题

男性,20岁,因乏力、纳差1个月,尿少、浮肿及高血压1周,化验检查发现贫血、蛋白尿及少尿,血肌酐及尿素均升高,B超示双肾增大,诊为“急性肾功能衰竭”。

如果化验血清抗肾小球基底膜抗体阳性,应特别注意鉴别()

A.狼疮性肾炎

B.过敏性紫癜肾炎

C.肺出血肾炎综合征

D.急性链球菌感染后肾炎

E.IgA肾病

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