问题 问答题

在3种有机物①CH2=CH2、②、③CH3COOH中,能使酸性高锰酸钾溶液褪色的是(填序号,下同)______,能发生酯化反应的是______,常温下为液态且难溶于水的是______.

答案

①CH2=CH2中含有C=C,能被酸性高锰酸钾溶液氧化,而使酸性高锰酸钾溶液褪色;

③CH3COOH能与醇发生酯化反应生成酯和水;

①CH2=CH2是气态,难溶于水;②是液态,难溶于水;③CH3COOH是液态,易溶于水;

故答案为:①;③;②;

选择题
阅读理解

For many years Henry had been a journalist. He had worked on many international newspapers and magazines and traveled over the world.

Henry had witnessed war and natural disasters such as floods, earthquakes and erupting volcanoes ( 火山爆发).

He had reported on serious accidents such as major fires and airline crashes.

He had seen every kind of terrible crime and strange event there was.

He had met and written about some of the most unusual people in the world.

In fact, there wasn’t much that Henry had not seen or done.

Now he was retired from journalism(新闻业). He owned a very expensive restaurant and spent his days talking to his wealthy and important customers. He liked to say that nothing surprised him.

One day he was sitting at the bar in his restaurant when a big gorilla(大猩猩) walked in and asked for a table.

Henry showed no surprise. He took the gorilla to a table and handed him a menu. He treated him politely and pretended there was nothing at all strange about having a gorilla in his restaurant.

The gorilla looked through the menu and ordered a salad.

Henry served the gorilla his salad personally, knowing that his waiters and waitresses would be too frightened.

At last the gorilla finished his salad and asked for the bill.

Henry wrote out the bill and handed it to the big animal.

The gorilla studied it, shook his head sadly then gave Henry fifty dollars.

“Thank you,” Henry said, and then to make conversation, he added, “we don’t get many gorillas in this restaurant.”

“At fifty dollars for a salad,” the gorilla said, “I’m not surprised.”

小题1:According to the story, Henry had________.

A.had the most exciting experiences

B.told the longest stories

C.made history

D.caused accidents小题2:One day when a gorilla came into the restaurant, Henry was_____.

A.very surprised by the gorilla

B.not disturbed(烦忧) by the gorilla

C.very interested in the gorilla

D.scared of the gorilla小题3: From the sentences “Henry served the gorilla his salad personally, knowing that his waiters and waitresses would be too frightened” you can learn that______.

A.his staff were not brave people

B.Henry didn’t normally serve customers

C.the gorilla had eaten there before

D.the gorilla was careful with his money