工作票有几种？各种的适用范围是什么？

下列各项，属表里经配穴的是（）

A.咳嗽取尺泽、太渊

B.感冒取列缺、合谷

C.膝痛取阳陵泉、阴陵泉

D.胃痛取中脘、内庭

E.痛经取公孙、隐白

按喷吹管路的多少分单管路、多管路，单管路优点：（）。

A、工艺简单

B、设备少

C、投资省

D、维修量小

According to a famous optical expert, Alexander, who recently visited Shanghai, the developed countries in Europe and America have made rules that children must wear resinous glasses instead of the traditional glasses made of glass. This is because the glass glasses are more likely to do harm to children’s eyesight.

Alexander pointed out, wearing the right glasses as soon as possible is still the best way to cure and put right children’s eyesight problems.

In America and Japan the resinous glasses have taken up 80 percent of the glasses market. And some European countries and America have made it a law that children, teenagers and drivers must wear resinous glasses. Now, about 10 million children in China have different eyesight problems and they need timely treatment.

But still, too many parents are buying the traditional glass glasses for their children. This is mainly because many parents know little or nothing about the good points of the resinous glasses. Besides, the price for the new glasses is a little higher than the traditional ones.

This news article mainly wants to tell us（）

A. Alexander visited China and introduced a new type of glasses

B. we should wear resinous glasses instead of glass glasses

C. resinous glasses are popular in Europe and America

D. glasses can be made of other materials instead of glass

（）的能源开发利用技术创新推动了清洁能源加快发展。

A.清洁低碳稳定

B.清洁低碳高效

C.清洁安全稳定

D.清洁安全高效

一段炉提负荷操作是先增加天然气再不蒸气。