问题 选择题

在密闭容器中,一定条件下,进行如下反应2NO(g)+2CO(g)⇌N2 (g)+2CO2 (g)△H<O,达到平衡后,为提高该反应的速率和NO的转化率,采取的正确措施是(  )

A.加催化剂同时升高温度

B.加催化剂同时增大压强

C.升高温度同时充入N2

D.降低温度同时增大压强

答案

A、加催化剂增大反应速率,同时升高温度平衡逆向进行,一氧化氮转化率减小,故A错误;

B、加催化剂增大反应速率,同时增大压强平衡正向进行,一氧化氮转化率增大,故B正确;

C、升高温度平衡逆向进行,一氧化氮转化率减小,同时充入N2平衡逆向进行,故C错误;

D、降低温度平衡正向进行,速率减小,同时增大压强平衡正向进行速率增大,转化率都增大,但温度对速率影响大,故D错误;

故选B.

完形填空

第三节回答问题(共 3 小题;每小题 2 分,满分 6 分)

阅读下面短文,根据第 58至第 60小题的具体要求,尽可能简要回答问题,并将答案转写到答题卡上。

ANGELA Chang didn’t think it would be so hard to turn singing into a career. She went to many different record companies. But the Taiwanese girl was always turned down for looking too young and small.

“I’d never had such difficulties before,” Chang said. “My confidence was smashed (粉碎) to pieces.”

Chang's talent was finally recognized in 2002. When she got a contract (合同), she burst into tears.

She soon became a star. Her first album Over the Rainbow (《飞越彩虹》) sold very well. She won many awards.

“You wouldn't believe such a powerful voice could come from such a small body,” said one musician after hearing Chang sing. “She has a special voice. You can't forget it.”

Never give up

But the 25-year-old has other talents too. Chang is also an actress. She has starred in the popular Taiwanese TV dramas, My MVP Valentine (《MVP情人》) and At Dolphin Bay (《海豚湾恋人》). Many people remember her ordinary-girl parts in the dramas.

But acting is difficult. Chang once acted so badly that she was nearly fired. Another time it took her 27 tries to get a scene right.

“I cried when I got back home,” Chang said. “But I knew that I wouldn't always fail. You only fail when you give up.”

Now with four albums behind her-Over the Rainbow, Aurora (《欧若拉》), Pandora (《潘朵拉》) and Flower in the Wonderland, it's clear that Chang and music were made for each other. As she sings in one song: “I have a pair of invisible (隐形的) wings. They fly me to the skies and give me hope.”

58. What was her first album? (回答词数不超过 3个)

_______________________________________________________________________________

59. Why was Chang always turned down?(回答词数不超过 7个)

_______________________________________________________________________________60. What talents does Chang have according to the passage? (回答词数不超过5个)

选择题