局部接地极应设置于什么地方？

发布时间：2017-06-24 14:15 │ 来源：www.tikuol.com

题型：问答题简答题

问题：

局部接地极应设置于什么地方？

考点：煤矿安全生产知识竞赛煤矿机电基本知识煤矿机电基本知识题库

题型：问答题简答题

如图是实验室制取并验证二氧化碳性质的实验，请回答下列问题：

（1）写出仪器名称a______；b______；

（2）广口瓶A中的药品，属液态的是______，块状固体是______．

（3）实验中，观察到广口瓶B中发生的现象是______，其反应的化学方程式是______．

（4）在广口瓶C中观察到的现象是______，其原因是（用化学方程式表示）______．

（5）D中的蜡烛，______先熄灭，说明二氧化碳具有______、______且______的性质．

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题型：问答题简答题

Directions: Read the following text and choose the most suitable heading from A-F for each paragraph.
There is one extra heading which you do not need.

A. Maintain a Balanced Diet.
B. Keep a Healthy Self-image.
C. Difficulty in Curing Eating Disorders
D. Best Prevention of Eating Disorders
E. What Factors Bring about an Earing Disorder?
F. How Does One Develop an Eating Disorder?

1.______
     The causes of eating disorders are not clear. There may be genetic or biochemical factors in some cases.
There may be psychological problems from early childhood or the present (such as school or family conflicts)
that trigger the problem. Often, there is the double pressure to enjoy life through food and yet remain ultra-slim.
Society all around us encourages eating and drinking as main ways to enjoy life. To be popular, you are
supposed to eat.
2.______
     But in real life most people, if they keep consuming like that, just keep pulling on more and more weight.
They then find themselves in conflict with another dominant pressure in society-to stay slim and trim. Models
in ads, even those shown earring fairy foods, are usually physically lit and quite thin. All of these pressures put
teens in a terrible situation. The "solution" that some teens choose is to deny themselves all the time so as to
keep temptation away. But soon, hunger and food boredom lead to overeating. Over time they develop anorexia
or ballerina.
3.______
     Once an earring disorder has become firmly established, there is no easy cure. Someone who's never
suffered anorexia and never known an anorexic might be tempted to think. "It's simple-just tell them to eat
more!" Unfortunately, it's not that simple. Even when anorexics have been brought into the hospital and arc
receiving physical care, nutritional therapy, and psychiatric care, many don't improve much.
4.______
     Our society's obsession with thinness, together with a constant emphasis on the theme that rich food means
pleasure, puts many teens in a difficult situation. Being drawn to overeating on the one hand and self-denial on
the other can bring about anorexia or bulimia-or both. Anorexics seem to feel that no matter how much weight
they lose, they are still too fat Therefore, it is important for each person in our society to try to maintain a health
y and realistic self-image. Don't compare yourself with the models and actors in the media Set your sights more
realistically by comparing yourself with family and friends, if anyone.
5.______
     Self-denial is the typical first step toward an caring disorder. Eventually, desires for what you've denied
yourself become unbearable, and you react with either a binge or overly fierce self-control. The answer is not
of course. 10 eat all the snacks and traces you fancy. But 10 avoid that first step that leads to overeating, strive
for a good and healthy diet. Such a diet is based primarily on grain products, fruits, and vegetables, with
moderate amounts of meat and dairy products and with small amounts of snacks and desserts. Research
demonstrates that miss kind of diet leaves you more alert and energetic.

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题型：问答题简答题

严重肝功能不良病人需用糖皮质激素治疗时不宜选用（）

A.泼尼松

B.泼尼松龙

C.氢化可的松

D.地塞米松

E.倍他米松

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题型：问答题简答题

以上施工人员作业前的教育内容包括哪些？

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题型：问答题简答题

简述问题解决过程。当前比较一致的观点是四阶段说：

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