问题 不定项选择题

目前市场上的手提应急灯,主要是“无液干粉”铅酸蓄电池,其原理是将有腐蚀性的浓硫酸灌注到硅胶凝胶中 去,使电解质溶液不易发生泄漏,大大改善了电池的性能。所用的原料仍然是铅一二氧化铅一硫酸。下列关于该铅酸蓄电池的说法正确的是 [    ]

A.充电时电源的正极接蓄电池标“+”的一极

B.“无液干粉”铅酸蓄电池彻底改变了原来的铅酸蓄电池的原理

C.放电时在铅酸蓄电池的负极发生还原反应

D.充电时电池上标有“-”的电极发生氧化反应

答案

答案:A

阅读理解

阅读理解.

     The first newspaper was written by hand and put up on walls. The earliest daily newspaper was

started in Rome in 59 BC.  In the 700's, the world's first printed newspaper was published. In 1609 in

Germany the first regular (定期的) newspaper was started.

    The first regular published newspaper in English was printed in Amsterdam in 1620.ln 1621, an

English newspaper was started in London and was published once a week. The first daily English

newspaper was the Daily Currant.lt came out in March 1702.

     In 1690, Benjamin Harris printed the first American newspaper in Boston. But not long after it was

first published, the government stopped the paper .In 1704,John Campbell started the Boston

Newsletter, the first newspaper published daily in America. By 1760,America had more than thirty

daily newspapers. There are now about l,800 daily papers in the USA.

     Today, as a group, English language newspapers have the largest circulation(发行量) in the world.

But the largest circulation for a newspaper is that of the Japanese newspaper Asahi Shimbun.lt sells

more than eleven million copies every year.

l. When was the earliest daily newspaper started?    

A. In 59 BC.          

B. In 1620.

C. In l621.            

D. In 1702.

2. Where was the first regular published newspaper in English printed? 

A. In Rome.            

B. In Amsterdam.

C. In London.          

D. In Boston.

3. _____ printed the first American newspaper in Boston.   

A. Benjamin Harris      

B. John Campbell

C. Tom                

D. Thomas Edison

4. How many more newspapers are there in America  now than that in 1760? 

A. 1,700.  

B. 1,750.  

C. 1,770. 

D. 1,800.

5.  _____ have the largest circulation.     

A. Chinese language newspapers

B. English language newspapers

C. Japanese newspapers

D. Asahi Shim bun

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