试题与答案

牵引电动机中油封主要采用曲折油封,曲折油封又称为()油封。

题型:填空题

题目:

牵引电动机中油封主要采用曲折油封,曲折油封又称为()油封。

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0620/f6771fc81edca4f4ee4bd22f19b7050d.html

下面是错误答案,用来干扰机器的。

参考答案:C解析:[考点] 第一章工程经济第三节建设项目不确定性分析,敏感性分析[思路] 此题是关于敏感性分析的,但是在实际解题中需要了解各种指标的特点和作用。投资回收期能够体现投资回收快慢,而财务内部...

试题推荐
题型:阅读理解

根据短文内容,从下框的A~F选项中选出能概括每一段主题的最佳选项,选项中有一项为多余项.

A.   Study the levels of stress by comparison.

B.Higher level of stress causes more trouble.

C.Milder stress does more harm than expected.

D.A certain level of stress is efficient in working conditions.

E.Always pay enough attention to mild stress.

F.Modern social conditions may lead to stress.

     1.________

     Even relatively mild stress can lead to long term disability and an inability to work, reveals a large

population based study published online in the Journal of Epidemiology (流行病学) and Community

Health.It is well known that mental health problems are associated with long term disability, but the impact

of milder forms of psychological stress is likely to have been underestimated (低估), say the authors.

     2.________

     Between 2002 and 2007, the authors tracked the health of more than 17,000 working adults up to the

age of 64, who had been randomly selected from the population in the Stockholm area. All participants

completed a validated (经验证的) questionnaire at the start of the Study to measure their mental health

and stress levels, as well as other aspects of health and wellbeing.

     3.________

     During the monitoring period, 649 people started receiving disability benefit -203 for a mental health

problem and the  remainder for physical ill  health. Higher levels of  stress at the start of the study were

associated with a significantly greater likelihood of subsequently being awarded long term disability benefits.But even those with mild stress were up to 70% more likely to receive disability benefits, after taking

account of other factors likely to influence the results, such as lifestyle and alcohol intake.One in four of

these benefits awarded for a physical illness, such as high blood pressure, angina(心绞痛), and stroke(中风), and almost two thirds awarded for a mental illness, were likely to have been caused by stress.

     4.________

     The authors say that it is important to consider their findings in the context of modern working life, which places greater demands on employees, and social factors, such as fewer close personal relationships and supportive networks.

     5.________

     These factors lead them to ask: "Are the strains and demands of modern society commonly exceeding (超出) human ability?" And they conclude that while mild stress should not be overmedicalised, their findings suggest that it should be taken more seriously than it is.

查看答案
微信公众账号搜索答案