甲类钢是保证机械性能供应的钢,乙类钢是保证化学成份供应的钢,特类钢是既保证化学成份又

题型:判断题

问题:

甲类钢是保证机械性能供应的钢,乙类钢是保证化学成份供应的钢,特类钢是既保证化学成份又保证机械性能供应的钢。

考点:焊工技能考试中级机械焊接工中级机械焊接工题库
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下列关于钩端螺旋体病的描述,不正确的是()

A.人主要是通过接触钩端螺旋体污染的水或±壤而被感染

B.钩端螺旋体病可累及全身多个脏器

C.钩端螺旋体致病与其产生的内毒素样物质有关

D.钩端螺旋体可进入血液引起钩端螺旋体血症

E.钩端螺旋体病患者病后可获得以细胞免疫为主的特异性免疫力

题型:判断题

()是LPG燃料供给系统中主要的部件,它的作用是将来自气瓶的LPG减压使其汽化并保持一定的压力供给混合器。

A.电磁阀

B.滤清器

C.蒸发调压器

D.调节器

题型:判断题

能源危机当前是一个全球性问题,开源节流是应对能源危机的重要举措。

(1)下列做法有助于能源“开源节流”的是      (填字母)。

a. 大力发展农村沼气,将废弃的秸秆转化为清洁高效的能源

b. 大力开采煤、石油和天然气以满足人们日益增长的能源需求

c. 开发太阳能、水能、风能、地热能等新能源、减少使用煤、石油等化石燃料

d. 减少资源消耗,增加资源的重复使用、资源的循环再生

(2)金刚石和石墨均为碳的同素异形体,它们在氧气不足时燃烧生成一氧化碳,在氧气充足时充分燃烧生成二氧化碳,反应中放出的热量如图所示。

 

(a)在通常状况下,金刚石和石墨相比较,      (填”金刚石”或”石墨”)更稳定,石墨的燃烧热为              

(b)12 g石墨在一定量空气中燃烧,生成气体36 g,该过程放出的热量为      

(3)已知:N2、O2分子中化学键的键能分别是946 kJ ▪mol-1、497 kJ ▪mol-1

N2 (g)+ O2 (g)="==" 2 NO (g) H="+180.0" kJ ▪mol-1

NO分子中化学键的键能为     kJ ▪mol-1

(4)综合上述有关信息,请写出用CO除去NO的热化学方程式:              

题型:判断题

DRAPL上的6辊轧机只轧制奥氏体不锈钢。

题型:判断题

It’s seven weeks into the new year. Do you know where your resolution is If you’re like millions of Americans, you probably vowed to lose weight, quit smoking and drink less in the new year. You kicked off January with a commitment to long-term well-being--until you came face-to-face with a cheeseburger. You spent a bundle on a shiny new gym pass. Turns out, it wasn’t reason enough for you to actually use the gym.

People can make poor decisions when it comes to health--despite their best intentions. It’s not easy abiding by wholesome choices (giving up French fries) when the consequences of not doing so (heart disease) seem so far in the future. Most people are bad at judging their health risks: smokers generally know cigarettes cause cancer, but they also tend to believe they’re less likely than other smokers to get it. And as any snack-loving dieter can attest, people can be comically inept at predicting their future .behavior. You swear you will eat just one potato chip but don’t stop until the bag is empty.

So, what does it take to motivate people to stick to the path set by their conscious brain How can good choices be made to seem more appealing than bad ones The problem stumps doctors, public-health officials and weight-loss experts, but one solution may spring from an unlikely source. Meet your new personal trainer: your boss.

American businesses have a particular interest in personal health, since worker illness costs them billions each year in insurance claims, sick days and high staff turnover. A 2008 survey of major US employers found that 64% consider their employees’ poor health decisions a serious barrier to affordable insurance coverage. Now some companies are tackling the motivation problem head on, using tactics drawn from behavioral psychology to nudge their employees to get healthy.

"It’s a bit paradoxical that employers need to provide incentives for people to improve their own health," says Michael Follick, a behavioral psychologist at Brown University and president of the consultancy Abacus Employer Health Solutions.

Paradoxical, maybe, but effective. Consider Amica Mutual Insurance, based in Rhode Island. Arnica seemed to be doing everything right: it boasts an on-site fitness center at its headquarters. It pays toward Weight Watchers and smoking-cessation help, gives gift cards to reward proper prenatal care and offers free flu shots each year. Still, in the mid-2000s, about 7% of the company’s insured population, including roughly 3 100 employees and their dependents, had diabetes. "We manage risk. That’s our core business," says Scott Boyd, Amica’s director of compensation and benefits. But diabetes-related claims from Arnica employees had doubled in four years. "We thought, OK," Boyd says now, "we have to manage these high-risk groups a little better.

Which of the following is TRUE according to the text()

A. If you want to keep healthy, you have to meet your personal trainer

B. The diabetes-related claims from Arnica employees have been increased

C. The American business doesn’t do anything concerned with personal health

D. Abiding by healthy choices is facile

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