问题 选择题

用下列有关实验装置进行相应实验,能达到实验目的的是

A.用图1装置蒸干CuCl2饱和溶液制备CuCl2晶体

B.用图2装置制取二氧化碳气体

C.用图3装置蒸馏海水制取少量淡水

D.用图4装置分离乙醇与乙酸乙酯的混合物

答案

答案:C

题目分析:A、氯化铜溶液中铜离子水解生成氢氧化铜和氯化氢,水解吸热且生成的氯化氢极易挥发,所以用图1装置蒸干CuCl2饱和溶液得不到CuCl2晶体,A不正确;B、稀硫酸与石灰石反应生成微溶物硫酸钙附着在石灰石表面,从而使反应不能进行到底得不到二氧化碳,B不正确;C、通过蒸馏可以将海水淡化,C正确;D、乙醇与乙酸乙酯互溶,不能直接分液,应该加入饱和碳酸钠溶液,然后再分液,D不正确,答案选C。

解答题
阅读理解

When I told my father that I was moving to Des Moines, Iowa, he told me about the only time he had been there. It was in the 1930s, when he was an editor if the literary magazine of Southern Methodist University(SMU)in Dallas, Texas. He also worked as a professor at SMU, and there was a girl student in his class who suffered from a serious back disease. She couldn;t afford the operation because her family was poor.

Her mother ran a boardinghouse in Galveston, a seaside town near Houston, Texas. She was cleaning out the attic(阁楼)one day when she came across an old dusty manuscript(手稿). On its top page were the words, “By O. Henry”. It was a nice story, and she sent it to her daughter at SMU, who showed it to my father. My father had never read the story before, but it sounded like O. Henry, and he knew that O. Henry had once lived in Houston. So it was possible that the famous author had gone to the beach and stayed in the Gainestown boardinghouse, and had written the story there and left the manuscript behind by accident. My father visited an O. Henry expert at Columbia University in New York, who authenticated the story as O. Henry’s.

My father then set out to sell it. Eventfully, he foud himself in Des Moines, meeting with Gardner Cowles, a top editor at the Des Moines Register. Cowles loves the story and bought it on the spot. My father took the money to the girl. It was just enough for her to have the operation she so desperately needed.

My father never told me what the O. Henry story was about. But i doubt that it could have been better than his own story.

小题1:Who found the O. Henry’s manuscript?

A.The girl’s mother.

B.The author’s father.

C.The girl.

D.The author.小题2:Which of the following might explain the fact that the manuscript was found in the attic?

A.O. Henry once worked in Houston.

B.O. Henry once stayed in Galveston.

C.O. Henry once moved to Des Moines.

D.O. Henry once taught at SMU.小题3:The underlined word “authenticated” in Paragraph 2 probably means __________.

A.named

B.treated

C.proved

D.described小题4:According to the text, why did the author’s father go to Des Moines?

A.To sell the O. Henry story.

B.To meet the author himself.

C.To talk with the O. Henry expert.

D.To give money to the girl.