指数基金的管理费用相对较高。 ( )

美国科学家利用哈勃太空望远镜观测、收集的数据，发现并证实暗能量对宇宙膨胀的加速作用，并测算出宇宙的实际年龄为137.5亿年。人类揭示宇宙形成的奥秘的道路上又向前迈进了一步。这说明（   ）

①认识的对象是无限变化的      ②实践的发展推动人类认识的发展

③认识的基础是永恒不变的      ④追求真理是一个永无止境的过程

A．①③

B．②④

C．①④

D．②③

That's surprising! It was an easy test and he ______ have passed.

A．must

B．might

C．should

D．would

圆的______和______的比值是一个固定的数，通常叫做______，它大约等于______，用字母表示为______．我国古代数学家______是第一个把它精确到七位小数的人．

有两尺寸相同、形状相同的铜合金铸件，一个含Ni90%，一个含Ni50%，铸后自然冷却，问哪个铸件固态下偏析严重为什么？

     Crosstalk, a traditional form of comic storytelling, is making a comeback in China's teahouses and

theaters.

     Audiences can laugh the night away every Saturday at the Qianxiangyi Teahouse in Tianjin,

entertained by the apprentices (学徒) of Hou Baolin, Ma Sanli or Yin Shoushan -- all leading crosstalk

artists of years past -for only 20 yuan (US$2.40). The success in Tianjin has also given motivation to the

rejuvenation (复活) of crosstalk in Beijing and other places.

     Although the art form originated in Beijing in the Qing Dynasty (1644-1911), Tianjin became a place

where rising stars developed their styles and new pieces were tried out. The city was famous for the

quality of its crosstalk performances.

     "We only want to bring the traditional pieces back to the audiences, helping them to learn their charms

and definitions," said Yin Xiaosheng, head of the Zhongyou Arts Troupe.

     Known in Chinese as xiangsheng (literally, "face and voice"), crosstalk was the main form of comedy

throughout most of the 20th century. In the old days in Tianjin and elsewhere, temple fairs and markets

were the main places for crosstalkers to perform, although they occasionally also appeared in teahouses

or theaters.

     Usually crosstalk pieces draw on every aspect of Chinese culture, from history and folk tales to

contemporary social issues. Although there are hundreds of pieces in the traditional works, they are

constantly rewritten to suit the times and the audience, while new works are written as well. This is one

of the features that have made crosstalk a populist(平民化) art form throughout its history.

     "Crosstalk was in the doldrums with competition from other art forms, especially TV," said Wang

Xiaochun, headmaster of the Northern Storytelling Arts School of China (NSAS). "But it has regained

its status with crosstalk fans, especially young people, growing aware of its rare qualities." The

reawakening of interest in the traditional art is going beyond merely watching and listening for many.

"More and more students are coming to NSAS to study crosstalk, including some girl students," said

Wang, "They are sure that crosstalk will have a strong market."

1. From the passage, we can know the crosstalk originates(源于) from ______.

A. the TV shows      

B. the teahouse and theater

C. the cinema           

D. the temple fairs and markets

2. Crosstalk makes a comeback mainly because_________.

A. it is one of the most popular traditional art forms

B. the pieces mainly cover folk tales and social issues

C. the pieces are changing with times and audience  

D. it is performed by some leading crosstalk artists

3. Which is the opposite of the underlined word "doldrums" (in the last paragraph)?

A. Boom.

B. Variety.

C. Harmony.

D. Period.

4. From the passage we can predict the future of crosstalk lies in______.

A. making up a variety of traditional pieces

B. having advantages over other media

C. young people's the awareness of its value     

D. the competitive and big markets for art