包装是指什么？

Beijing Opera is also called Peking Opera. It came into being after 1790 when the famous four Anhui opera troupes(戏班) came to Beijing. Its music and singing(唱腔) come from Xipi and Erhuang in Anhui and Hubei. Its costumes are all fascinating and artistic. It is the highest expression of the Chinese culture. It’s full of famous stories, beautiful facial paintings, and wonderful gestures and fighting. This kind of opera is very popular with Chinese people.

There are four main roles in Beijing Opera: Sheng, Dan, Jing and Chou. Sheng is the leading male(男性) actor. For example, a Wusheng is a soldier or fighter. A Xiaosheng is a young man. A Laosheng is an old man. Dan is the female(女性) role. Jing, mostly male, is the face-painted role and Chou is the comedy actor or clown.

Stories in Beijing Opera are very interesting. Some of them are from the history book, but most of them are from the literature, especially famous novels. The people in the story usually have some disagreements. They become angry and unhappy. They are sad and lonely. Sometimes they are nervous and worried. Then they find a way to make peace. The stories usually end with happiness and laughter and people are all happy in the end.

小题1:Beijing Opera’s singing is from ____________.

A．Anhui and Hubei

B．Beijing and Anhui

C．the history book

D．the literature and novels小题2:The second paragraph of the reading is about the _________ of Beijing Opera.

A．stories

B．roles

C．gestures

D．paintings小题3:From the reading, we know the role Chou most probably has a (n) _________ feature.

A．honest

B．funny

C．dull

D．serious小题4:Which of the following is the role Sheng?

A．

B．

C．

D．小题5:Which of the following statements is TRUE?

A．Peking Opera is full of different gestures.

B．There are only four roles in Beijing Opera.

C．Beijing Opera is the most popular in the world.

D．The people in the story usually are in agreement.

乙二醇脱水塔切出检修时塔釜物料排向（）。

A、乙二醇精制塔

B、粗乙二醇贮罐

C、装桶

D、蒸发系统

免疫电泳技术不包括（）

A.对流电泳

B.火箭电泳

C.双扩散

D.免疫固定电泳

E.琼脂平板电泳和双相免疫扩散结合试验

Griffin等对HLB值的定义是：

A．表面活性剂分子中含亲水基的摩尔百分数被5除
B．表面活性剂分子中含亲水基的摩尔百分数被10除
C．表面活性剂中含亲水基的摩尔百分数被20除
D．表面活性剂分子中含亲油基的摩尔百分数被10除
E．表面活性剂中含亲油基的摩尔百分数被20除

简述社会文化历史学派的基本观点。或：社会文化历史学派有什么重要特征？