问题 选择题

下列现象或事实可用同一原理解释的是 [ ]

A.浓硫酸和浓盐酸长期暴露在空气中浓度降低

B.氯水和活性炭使红墨水褪色

C.漂白粉和水玻璃长期暴露在空气中变质

D.乙炔和乙烯使溴的四氯化碳溶液褪色

答案

答案:D

单项选择题
阅读理解

B

After the American Revolution won in 1787, the new government in the U.S.A. had to choose a capital city. The thirteen states quarreled about this. So the government decided to build a completely new capital. The land on the River Potomac was given the name District of Columbia (D.C). The new Capital was built on the north bank of the river. It was named after George Washington, the president of the U.S.A.

Washington D. C., a government city, is an important cultural (文化) center as well as a big tourist (游览) center.

Most capital cities have simply grown from small cities. Washington, however was planned as the capital of a great nation. It was designed by a French artist who first made a study of many capital cities of Europe. In general, his plan followed the plan of the beautiful French city of Versailles (凡尔赛).

61. When the new capital was built , America was made up of ____ states.

A. thirteen                           B. thirty         C. fifty                  D. fifteen

62. Washington D.C. is the name of _______.

A. an American president            B. America’s capital

C. a famous river                  D. a beautiful garden city

63. According to the passage we can conclude that America’s capital_____.

A. lies in the center on the country              B. came from a small city

C. was built by French workers            D. lies on the River Potomac

64. According to the passage we can infer that Washington D.C. is the center of America’s ______.

A. economy (经济), sports and culture B. culture, traveling and sports

C. politics, culture and traveling          D. politics, culture and economy