一根铁丝可以围成一个半径是6厘米的圆．如果把这根铁丝重新围成一个正方形，这个正方

The weather turned out to be fine yesterday. I ______ my umbrella with me.[ ]

A. would have carried

B. could have carried

C. needn't have carried

D. mustn't have carried

第四方物流供应链的功能有哪几个层次﹙﹚

A.执行

B.实施

C.变革

D.再造

为了吸引外资，发展中国家改善投资环境，目的主要是为了

A．扩大市场

B．降低劳动力价格

C．降低地价

D．降低内部交易成本

阅读理解。

     Beijing opera or Peking opera (Pinyin: J?ngj?) is a form of Chinese opera which arose in the late

18th century and became fully developed and recognized by the mid-19th century. The form was

extremely popular in the Qing Dynasty court and has come to be regarded as one of the cultural

treasures of China. Major performance troupes (剧团,戏班子) are based in Beijing and Tianjin in

the north,and Shanghai in the south. The art form is also enjoyed in Taiwan,and has spread to other

countries such as the United States and Japan.

     Beijing opera features four main types of performers. Performing troupes often have several of

each variety,as well as numerous secondary and tertiary performers. With their elaborate (认真的,

精心的) and colorful costumes,performers are the only focal points on Beijing opera's characteristically

small stage. They make use of the skills of speech,song,dance,and combat in movements that are

symbolic and suggestive,rather than realistic. Above all else,the skill of performers is evaluated

according to the beauty of their movements. Performers also hold a variety of stylistic conventions

that help audiences navigate the plot of the production. The layers of meaning within each movement

must be expressed in time with music. The music of Beijing opera can be divided into the Xipi and

Erhuang styles. Melodies include arias (唱腔),fixed-tune melodies,and percussion patterns. The

repertoire of Beijing opera includes over 1,400 works,which are based on Chinese history,folklore,

and,increasingly,contemporary life.

     In recent years,Beijing opera has attempted numerous reforms in response to sagging audience

numbers. These reforms,which include improving performance quality,adapting new performance

elements,and performing new and original plays,have met with mixed success. Some Western works

have been adopted as new plays,but a lack of funding and an adverse political climate have left Beijing

opera's fate uncertain as the form enters the 21st century.

1. How long has Beijing Opera become a popular art form?

A. About one and a half centuries.

B. More than two centuries.

C. More than one century.

D. About half a century.

2. How many art forms of Beijing Opera at present?

A. Two including Beijing and Tianjin,and Shanghai in the south.

B. Two including Beijing and Tianjin in the north.

C. Three including Beijing and Tianjin,and Shanghai in the south and Taiwan.

D. Five including Beijing and Tianjin,and Shanghai in the south,Taiwan,US and Japan.

3. What are the features of the performers' movements of Beijing Opera?

A. Elaborate.

B. Colourful.

C. Realistic.

D. Representative.

4. Which of the followings is NOT true according to the passage?

A. Performers can take different stylistic traditions in the plays.

B. The standard to estimate a performer is the amount of his/her movements.

C. It's necessary to keep movements along the music in time.

D. The content of Beijing Opera is plentiful but much fixed.

5. What will be the future of the Beijing Opera?

A. Very bright.

B. Certainly good.

C. Much uncertain.

D. More popular.

下列各项，不属于"十八反"的是（）

A.甘草反甘遂

B.乌头反贝母

C.藜芦反半夏

D.甘草反大戟

E.乌头反瓜蒌