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当前学科：安全生产技术
题目：
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钻孔时，当钻尖快要钻穿工件时，应()钻尖下降速度
A . 减慢
B . 加快
C . 保持不变
D . 先慢后快
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根据以下材料回答题： Age DiscriminationBy the year 2000 nearly half the workforce in Europe are over 40 and yet throughout Europe there is a deep ambivalence ( 犹豫 )-if not outright suspicion-towards the capabilities of older workers.Those over the age of 40 generally take longer to find new employment, but European governments have done little to protect their employment rights. Only Germany, with incentives to business to encourage the employment of older people, and France, with the introduction of legislation making it illegal to use age barriers in recruitment-or to make employees redundant because of their age done anything substantive to combat age discrimination.Yet even in these two countries, there has been no noticeable improvement in the lot of the older workers; indeed, in France, job advertisements flout ( 轻视，反对 ) the law openly by asking for applicants of a certain age. So, should France and Germany be tightening up their laws and should the rest of Europe follow suit?Bill Robbins, a careers consultant said, "Legislation against age discrimination has been in existence for well over ten year in the U.S. and Canada, but has had no effect. Employers will always be able to find some reasons for turning down an older applicant without appearing to break the law."Ironically, it was governments which played a leading role in hardening business culture against older workers in the first place. In the late 1970s, many European countries were extremely concerned about the levels of youth unemployment, and France, Germany and Belgium even initiated incentive schemes for businesses to encourage older employees to take early retirement provided that younger trainees were taken on in their place. As more and more employees took early retirement, often willingly, a new, youth-oriented culture permeated business throughout most of Europe-even in those countries that had taken no active measures to promote it.Demographic ( 人口统计学的 ) trends mean that governments are now anxious to slow down the policy of early retirement as they realize that they simply do not have the funds to meet their pension promises. But reversing business attitudes is no easy matter. Dianah Worman a policy adviser said, "There is a widely held belief that older people are less, adaptable and trainable. This is just not true: research has shown that differences in capability are as wide within age groups as they are between them."Which of the following words can best describe the European attitude to older workers?
汽轮机排汽缸为什么要装喷水减温装置？
排水方沟在下，另一排水管道或热力方沟在上，高程冲突，上下管道同时施工时管道交叉处理的方法是：（ ）。
异装癖
一个职工正在生产过程中表现出色，经常加班加点，上半年已经在干第二年的活。他自己的工作行为经常受到厂领导和车间的领导的各种形式的强化张后来发现他身体不好，工作中体力不支，于是领导除嘱咐他多注意身体外，不再对其工作行为进行强化，使其加班加点超负荷工作的行为，削弱减少。属于强化理论的哪个内容（）？
男性，20岁，发现高血压2年，血压在（180～220）／（110～130）mmHg，尿蛋白（++），尿素氮11.5mmol/L，血肌酐5mg／L，心电图示左室肥厚劳损，最可能的诊断是（）
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对称三相电源星形连接时，线电压超前相电压（）。
蒙古族历史上的第一位语言文学家是（）。
理论性论据同时也是新闻评论的论点。()