谐波除了对旋转设备和变压器引起附加损耗和（）之外，还会增加线损。

（12分）某氢氧化钙中含有碳酸钙杂质，称取研细的该样品12.4g放入锥形瓶中，加入32.6g水，充分振荡形成悬浊液，再向锥形瓶中逐滴滴加盐酸使其充分反应至无气泡产生，测得加入盐酸的质量与锥形瓶中物质的质量关系如下表所示．

加入盐酸的质量/g	0	25	37.5
锥形瓶中物质的质量/g	45	70	80.3

（1）加入盐酸的质量在0﹣25g时，　　与盐酸发生反应．

（2）反应产生二氧化碳的质量为　　g．

（3）求样品中氢氧化钙的质量分数（写出计算过程，精确到0.1%）．

函数f（x）=log_a|x+1|，在（-1，0）上有f（x）＞0，那么（　　）

A．f（x）在（-∞，0）上是增函数

B．f（x）在（-∞，0）上是减函数

C．f（x）在（-∞，-1）上是增函数

D．f（x）在（-∞，-0）上是减函数

提出“超以象外，得其环中”的诗歌理论，推崇“不着一字，尽得风流”，以“味外之旨”为“全美”的是（）

A、司空图

B、钟嵘

C、刘勰

D、庄子

哺乳动物的胰岛至少含5种内分泌细胞，即（），（），（），（），和（）。

Beijing opera or Peking opera （Pinyin: Jīngjù） 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．

小题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.小题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小题3:What are the features of the performers’ movements of Beijing Opera?

A．Elaborate.

B．Colourful.

C．Realistic .

D．Representative.小题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.小题5:What will be the future of the Beijing Opera?

A．Very bright.

B．Certainly good.

C．Much uncertain.

D．More popular.