根据汉字国标GB 2312-1980的规定，二级次常用汉字个数是( )。A．300

头发逐渐脱落，脱屑多而痒重，粘腻或如油涂水洗者，病机为：

A．外感风热之毒，阻于肺胃二经，蕴蒸皮肤而发
B．情志内伤，肝气郁结，久而化火，肝经火毒，外溢皮肤而发
C．寒湿困脾，脾失健运，肌肤失养而发
D．肝胆湿热，蕴结肌肤而发
E．禀赋不耐，风、湿、热毒郁于肌肤而发

依据《燃煤二氧化硫排放污染防治技术政策》，在热网区外和未进行集中供热的城市地区，以下可以新建燃煤锅炉的产热量是（）。

A.0.35MW

B.0.7MW

C.1.4MW

D.4.2MW

涵洞和倒虹吸应重点检查哪些内容？

甲、乙二人为广州人，2002年双方曾经订立买卖合同。不久，甲被派到美国留学，一直未回。2003年双方中断联系，乙邮寄的信件被退回，因此乙欲就该买卖合同提起诉讼。据此回答以下问题：

人民法院受理案件后，委托我国驻美使领馆将起诉状副本送达被告，但由于被告已不在原住址居住，起诉状副本被退回。此时人民法院应当；

A．通知原告撒诉

B．通过国际刑警组织查询甲的下落

C．公告送达

D．委托美国驻华使领馆送达

阅读理解。

              The Diet Zone: A Dangerous Place

      Diet Coke, diet Pepsi, diet pills, no-fat diet, vegetable

diet... We are surrounded by the word" diet" everywhere we look

and listen. We have so easily been attracted by the promise and

potential of diet products that we have stopped thinking about what

diet products are doing to us. We are paying for products that

harm us psychologically and physically (身体上).

       Diet products significantly weaken us psychologically. On one

level, we are not allowing our brains to admit that our weight

problems lie not in actually losing the weight, but in controlling

the consumption of fatty, high-calorie, unhealthy foods. Diet

products allow us to jump over the thinking stage and go straight

for the scale (秤) instead. All we have to do is to swallow or

recognize the word" diet" in food labels.

        On another level, diet products have greater psychological

effects. Every time we have a zero-calorie drink, we are telling

ourselves without our awareness that we don't have to work to get

results. Diet products make people believe that gain comes without

pain, and that life can be without resistance and struggle.

       The danger of diet products lies not only in the psychological

effects they have on us, but also in the physical harm that they

cause. Diet foods can indirectly harm our bodies because

consuming them instead of healthy foods means we are preventing

our bodies from having basic nutrients (营养成分).  Diet foods

and diet pills contain zero calorie only because the diet industry

has created chemicals to produce these wonder products. Diet

  products may not be nutritional, and the chemicals that go into diet

products are potentially dangerous.

       Now that we are aware of the effects that diet products have

on us, it is time to seriously think about buying them. Losing

weight lies in the power of minds, not in the power of chemicals.

Once we realize this, we will be much better able to resist diet

products, and therefore prevent the psychological and physical

harm that comes from using them.

1. From Paragraph 1,we learn that ____   

A. diet products fail to bring out people's potential

B. people have difficulty in choosing diet products

C. diet products are misleading people

D. people are fed up with diet products

2. One psychological effect of diet products is that people tend to ____  .  

A. try out a variety of diet foods

B. hesitate before they enjoy diet foods

C. pay attention to their own eating habits

D. watch their weight rather than their diet

3. In Paragraph 3, " gain comes without pain" probably means____.       

A. losing weight is effortless

B. it costs a lot to lose weight

C. diet products bring no pain

D. diet products are free from calories

4. Diet products indirectly harm people physically because suchproducts____.    

A. are over-consumed

B. lack basic nutrients

C. are short of chemicals

D. provide too much energy 

5. Which of the following shows the structure of the passage?

CP: central point

P: point

SP: sup-point

C: conclusion