问题 实验题

小勇在化学晚会上观看了“瓶吞鸡蛋”的魔术

(如图1),看到鸡蛋被吞进瓶内.该反应的化学方程式是 _________ .小勇思考:瓶能吞蛋,能不能吐蛋呢?他进行了如图2的实验,结果鸡蛋吐了出来.他加入的试剂P是 _________ ,反应的化学方程式是 _________ ,吐蛋的原因是 _________

答案

2NaOH+CO2=Na2CO3+H2O;稀盐酸,Na2CO3+2HCl=2NaCl+H2O+CO2↑;锥形瓶内产生大量的气体,使瓶内压强增大

阅读理解

I never thought I would have a life-changing experience at Wal-Mart.

Although my thoughts were only on speed, the checkout line I was standing in wasn't moving as quickly as I wanted, and I glanced toward the cashier.

There stood a man in his seventies, wearing glasses and a nice smile. I thought, well, he's an old guy!

For the next few minutes I watched him. He greeted every customer before scanning the items. Sure, his words were the usual, "How's it going?" But he did something different--he actually listened to people. Then he would respond to what they had said and engage them in brief conversation.

I thought it was odd. I has grown accustomed to people asking me how I was doing simply out of robotic conversational habit. After a while, you don't give any thought to the question and just mumble something back. I could say, "I just found out I have six months to live," and someone would reply, "Have a great day!"

But that wasn't the end.

He gave them the change, walked around the counter, and extended his right hand in an act of friendship. He looked the customers in the eyes. "I sure want to thank you for shopping here today," he told them. "You have a great day. Bye-bye."

The looks on the faces of the customers were priceless. There were smiles and some sheepish grins. All had been touched by his simple gesture--and in a place they never expected. They would gather their things and walk out, smiling.

Of course, he did the same to me and I got to know his name--Marty.

Who was that guy? It was as if Sam Walton had come back from the dead and invaded this old guy's body.

I had never walked away from that shop feeling like that.

小题1:What was most customers' reaction to Marty's behavior?

A.They thought it priceless.

B.They thought it awful and odd.

C.They felt somewhat offended.

D.They were in some way moved.小题2:The checkout line the writer was standing in moved slower than expected because______

A.the cashier did more than scanning the items

B.the cashier couldn't work as fast as others

C.there were some big purchases

D.the writer was not patient enough小题3:What can we infer about Sam Walton?

A.He might be Marty's father or grandfather.

B.He might have died while working in the market.

C.He might be friendly and devoted to Wal-Mart.

D.He might have come back from the dead once before.小题4:According to the writer, when common people ask you "How's it going?"

A.they are just practicing their conversation ability

B.they are inquiring about your private information

C.they don't expect to hear any negative answers

D.they don't really care what you may answer小题5:What does the writer intend to express through the text?

A.Our everyday life is always full of surprises.

B.Being different is a good way of doing business.

C.A little positive action can make a big difference.

D.Most customers enjoy being treated this way.

选择题