在一台锅炉中安全阀整定压力最高的部位是()。A、省煤器 B、锅筒 C、过热器

题型:单项选择题

问题:

在一台锅炉中安全阀整定压力最高的部位是()。

A、省煤器

B、锅筒

C、过热器

考点:锅炉工锅炉工题库
题型:单项选择题

区分氢氧化铁胶体与含酚酞的稀氢氧化钠混合溶液最简便的方法是(  )

A.观察颜色

B.丁达尔效应

C.过滤

D.蒸馏

题型:单项选择题

丝虫病的感染方式()

A.经口感染

B.经皮肤感染

C.经蚊叮咬感染

D.输血感染

E.经接触感染

题型:单项选择题

阅读理解。

     Winter's short days are more than cold. For many people, winter depression, the most common type

of Seasonal Affective Disorder(SAD), is as much a part of the reason as hats and scarves (围巾).

     Winter serious SAD sufferers may need medical treatment. Those feeling a little blue can help themselves

by sticking to a healthy lifestyle. Here are some tips:

     Pace yourself. Don't expect to do everything you normally can. Set a realistic schedule. Don't listen to

negative thinking, like blaming yourself or expecting to fail.

     Get involved in activities that make you feel good or feel like you've achieved something. For example,

play table tennis or badminton.

     If you are feeling depressed, you may feel like staying away from friends. Yet this is a time when a

friend's support can be helpful. Call them regularly. Remember, the more we put off calling or visiting a

friend, the harder it is to rebuild a friendship.

     Think clearly about what's wrong or right. Instead of giving in to vague feelings of sadness, look at

your problems objectively. Break down problems into specific issues that you can work on.

    Regular exercise helps to prevent and ease depression.

    Eat well. Studies show that a healthy diet can help to maintain(keep) a healthy body and mind. The

vitamins, minerals and micro-nutrients found in a balanced diet may help our bodies to produce feel-good

hormones (荷尔蒙).Foods containing chemicals to help produce feel-good hormones include bananas,

turkey, nuts and seeds. Eat at least five pieces of fruit and vegetables every day. P.S.Symptoms (症状)

of SAD: No interests or pleasure in things you used to enjoy Increased need for sleep A change in eating

habits, especially an appetite for sweet or starchy (含淀粉的) foods Weight gain A heavy feeling in the

arms or legs A drop in energy level Difficulty in concentrating Overly emotional Avoidance of friends and

social situations Frequent feelings of guilt Long-term feelings of hopelessness, and physical problems, such

as headaches

1.The writer of the passage agrees that ______.

A. the cold in winter makes us suffer from SAD

B. hats and scarves are as important as SAD

C. everyone of us meets SAD in winter

D. we are blue mainly because of short days in winter

2. It can be inferred that ______.

A. a more darkness will make us sad

B. we should wear hats and scarves in winter

C. a healthy lifestyle prevents us from serious SAD

D. staying away from friends makes us depressed

3. When we pace ourselves, we ______.

A. don't do anything we can

B. make a practical plan

C. expect to succeed in nothing

D. think something of guilt

4. The passage includes the following EXCEPT _____.

A. the earlier we meet friends, the easier it is to rebuild a friendship

B. if we give up to unclear feelings of sadness, we'll be caught in the SAD

C. playing table tennis helps us achieve whatever we want

D. feel-good hormones from a balanced diet can help keep a healthy body

题型:单项选择题

检测体内组织化学成分唯一的、无创性检查手段是()。

A.MRCP

B.MRU

C.MRM

D.MRS

E.MRA

题型:单项选择题

有固定生产经营场所、财务和发票管理制度健全的纳税人,发票使用量较大或统一发票式样不能满足经营活动需要的,可以向哪一级税务机关申请印有本单位名称的发票?

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