问题 填空题

A~F是常见物质,它们之间有如下图所示的转化关系(反应条件已略去).已知C是红色固体,A、E是黑色固体.

请回答:

(1)写出下列物质的化学式:A______;C______.

(2)写出下列变化的化学方程式(要注明反应条件):

A+E:______;

B+F:______.

答案

(1)两种黑色固体A、E反应后生成红色固体C,符合这一反应特征的反应为木炭还原氧化铜,结合C为红色固体,可以知道C为铜,而D为二氧化碳气体;物质B和E反应也生成铜和二氧化碳,可以判断B为一氧化碳;A和D都能够和物质F反应生成二氧化碳,所以可以判断F是氧气,其中A的化学式为:C,C的化学式为Cu;

(2)根据(1)的解答可以知道A+E的反应为碳和氧化铜的反应,它们反应生成了铜和二氧化碳;而B+F的反应为一氧化碳和氧气的反应,它们反应生成了二氧化碳.

故答案为:(1)C;Cu;

(2)C+2CuO

 高温 
.
 
2Cu+CO2↑;2CO+O2
 点燃 
.
 
2CO2

完形填空

Sense of humor is just one of the many things shared by Alfred and Anthony Melillo, 64-year-old twin brothers from East Haven who made history in February 2012. On Christmas Eve, 2002, Anthony had a heart transplant(移植)from a 21-year-old donor(捐赠者). Two days before Valentine’s Day in 2012, Alfred received a 19-year-old heart, marking the first time on record that twin adults each received heart transplants.

“I’m 15 minutes older than him. But now I’m younger because of my heart and I’m not going to respect him, ”Alfred said with a smile, pointing to his brother while talking to a roomful of reporters, who laughed frequently at their jokes.

While the twins knew that genetics(遗传学)might have played a role in their condition, they recognized that their bad eating habits might have also contributed to their heart problems. “We’d put half a pound of butter on a steak. I overdid it on all the food that tasted good, so I guess I deserved what I got for not dieting properly. ”

The discussion moved to Anthony’s recovery. In the five years since his heart transplant, he had been on an exercise program where he regularly rode a bicycle for five miles, swam each day, and walked a couple of miles. He was still on medication(药物治疗)but not nearly as much as Alfred, who was just in the early stage of his recovery.

Alfred said his goal, of course, was to feel even better than his brother. “But”, he added, “I love my brother very much. We’re very close and I’m sure we’ll do just fine. ”

小题1:What is this passage about? (within 10 words)

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小题2:What did Alfred and Anthony have in common in character according to Paragraph 1? (within 7 words)

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小题3:Why did Alfred say he was younger than Anthony? (within 8 words)

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小题4:What were the most probable two causes of the brothers’heart problem? (within 6 words)

                                                                  

小题5:What did Anthony do for five years after his operation? (within 7 words)

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