问题 选择题

“乙醇汽油”就是在汽油里加入适量乙醇混合而成的一种燃料。下列有关叙述正确的是 [ ]

A.乙醇汽油是一种清洁能源,燃烧不会产生污染        

B.乙醇与汽油组成元素相同,化学成分相似

C.乙醇汽油燃烧时,耗氧量高于等质量的汽油         

D.乙醇可通过淀粉转化制得,是一种可再生的燃料

答案

答案:D

判断题
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