制硫废热锅炉有两个安全阀,具定值:()。A.一样大 B.一个大,一个小,但相差不大

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问题:

制硫废热锅炉有两个安全阀,具定值:()。

A.一样大

B.一个大,一个小,但相差不大

C.两个不一样,差值很大

D.没有关系

考点:硫磺回收装置操作工考试硫磺回收装置操作工考试题库
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关于螺旋体的特征,叙述不正确的是()

A.除钩体外,人工培养较为困难

B.属于原核细胞型微生物

C.通常用暗视野显微镜观察其形态

D.细胞壁缺失后仍可存活

E.以二分裂方式进行增殖

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下列关于软膏基质的叙述中、错误的是

A.凡士林加入羊毛脂可增加吸水性

B.液体石蜡主要用于调节软膏稠度

C.乳剂型基质中因含有表面活性剂,对药物的释放和穿透均较油脂性基质差

D.基质主要作为药物载体,对药物释放影响不大

E.水溶性基质能吸收组织渗出液,释放药物较快,无刺激

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在SCADA系统的AI通道故障处理过程中,应使用()检查

A、万用表的电压档串接在回路中

B、万用表的电流档并接在回路中

C、万用表的电压档并接在回路中

D、万用表的电流档串接在回路中

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神经系统的核素显像包括()

A.局部脑血流灌注显像

B.脑脊液显像

C.脑葡萄糖代谢显像

D.神经受体显像

E.乙酰唑胺介入试验

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Going to the ballpark, visiting friends and playing bingo are simple diversions for many of us. But for the elderly, these social pastimes may play a critical role in preserving their physical and mental health.

(46) In fact, a new study suggests that the less time older people spend engaged in social activity, the faster their motor function tends to decline. "Everybody in their 60s, 70s and 80s is walking more slowly than they did when they were 25," says Dr. Aron Buchman, a neurologist at the Rush University Medical Center in Chicago and leading author of the study, which was published in the June 22nd issue of the Archives of Internal Medicine. (47) "Our study shows the connection between social activity and motor function--and opens up a whole new universe of how we might intervene. "

(48) An increasing body of evidence has suggested that participating in mentally stimulating activity, socializing frequently and exercising may help protect against age-related decline-at least cognitive decline. As early as 1995, neuroscientist Carl Cotman, who studies aging and dementia at the University of California at Irvine, published a paper in Nature showing that physical exercise produces a protein that helps keep neurons from dying and spurs the formation of new neural connections in the brain. (49) More recently, Cotman demonstrated in studies of elderly dogs and mice that enriching their social environment is associated with improvement in brain function.

Researchers are also finding that social activity may be linked to the same protective effect in people. A recent study of 2 500 adults ages 70 to 79, published in the journal Neurology, found that those who were able to stay mentally sharp were also those who exercised once a week or more, had at least a ninth grade literacy level and were socially active.

While further research needs to be done to establish the exact impact of social activity and exercise on specific age-related declines (50) it’s likely that a reduction in social activity may simply be a symptom of physical decline, since people may naturally withdraw from social engagement as they lose motor skills-most researchers would agree that it is not unreasonable to encourage seniors to get out there more. Only 10% of people over 65 get the recommended amount of exercise (at least 2. 5 to 5 hours a week), and given that seniors already tend to be more socially isolated than younger adults, it’s difficult to motivate them to become more active. "If you are alone, you are less likely to follow recommendations," notes Verghese. It might help, though, if you visit Grandma more often and let her know that a regular pastime may just help her stay fitter and sharper longer.

(47) "Our study shows the connection between social activity and motor function--and opens up a whole new universe of how we might intervene. "

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