哪个阶层才能代表社会的良心、公正？（） A.低收入阶层 B.中产阶层 C.高产阶层

化工生产中常用到“三酸两碱”，“三酸”指硝酸、硫酸和盐酸，“两碱”指烧碱和纯碱。

（1）从物质的分类角度看，不恰当的一种物质是        （填物质的化学式）。

（2）“三酸”与“两碱”之间的反应，若用化学方程式表示有六个（酸过量时），若用离子方程式表示却只有两个，请写出这两个离子方程式：（酸过量时）     、               。

（3）“三酸”常用于溶解金属和金属氧化物。下列块状金属在常温时能全部溶于足量浓硝酸的是        。

A．Au

B．Cu

C．Al

D．Fe（4）烧碱、纯碱溶液均可吸收CO₂，当含0．1 mol NaOH的溶液吸收一定量CO₂后，将溶液低温小心蒸干得到固体的组成可能有四种情况，分别是（填化学式）：

①        ，②Na₂CO₃，③        ，④NaHCO₃。

下列关于氯气的说法错误的是（　　）

A．密度比空气大

B．有毒

C．黄绿色气体

D．使干燥的有色布条褪色

三、阅读理解（共20 小题;每小题 2分，满分40分）

After giving a talk at a high school, I was asked to pay a visit to a special student. An illness had kept the boy home, but he had expressed an interest in meeting me. I was told it would mean a great deal to him, so I agreed.

During the nine-mile drive to his home, I found out something about Matthew. He had muscular dystrophy (肌肉萎缩症). When he was born, the doctor told his parents that he would not live to five, and then they were told he would not make it to ten. Now he was thirteen. He wanted to meet me because I was a gold-medal power lifter, and I knew about overcoming obstacles（克服困难） and going for（努力实现） my dreams.

I spent over an hour talking to Matthew. Never once did he complain（抱怨）or ask, “Why me?” He spoke about winning and succeeding and going for his dreams. Obviously, he knew what he was talking about. He didn’t mention（提到） that his classmates had made fun of him because he was different. He just talked about his hopes for the future, and how one day he wanted to lift weights with me. When we had finished talking, I went to my briefcase（公事包） and pulled out the first gold medal I had won and put it around his neck. I told him he was more of a winner and knew more about success and overcoming obstacles than I ever would. He looked at it for a moment, then took it off and handed it back to me. He said, “You are a champion（冠军）. You earned that medal. Someday when I get to the Olympics and win my own medal, I will show it to you.”

Last summer I received a letter from Matthew’s parents telling me that Matthew had passed away（去世）. They wanted me to have a letter he had written to me a few days before:

Dear Dick,

My mum said I should send you a thank-you letter for the picture you sent me. I also want to let you know that the doctors tell me that I don’t have long to live any more, but I still smile as much as I can.

I told you someday that I would go to the Olympics and win a gold medal, but I know now I will never get to do that. However, I know I’m a champion, and God knows that too. When I get to Heaven（天堂）, God will give me my medal and when you get there, I will show it to you. Thank you for loving me.

Your friend,

Matthew

36. The boy looked forward to meeting the author because _________.

A. he was also good at weight lifting

B. he wanted to get to the Olympics and win a medal

C. the author was handsome

D. he admired the author very much

37. The underlined sentence（划线的句子） in the third paragraph probably means that _______.

A. the boy never complained about how unlucky he was to have this disease

B. the boy never complained about not being able to go to school

C. the boy never complained why the author had never come to see him before

D. the boy never complained about not getting a medal

38. From the passage we learn that _________.

A. Matthew was an athlete

B. Matthew was an optimistic and determined boy

C. The author used to have the same disease as Matthew had

D. Matthew became a champion before he died

39. Matthew didn’t accept the author’s medal because _________.

A. he thought it was too expensive

B. he was sure that he could win one in the future

C. he thought it was of no use to him as he would die soon

D. he would not be pitied by others

40. What would be the best title for this passage?

A. A sick boy.                  B. A special friend.

C. A real champion.             D. A famous athlete.

关闭释放表单的方法是______。

A．shut

B．closeForm

C．release

D．close

电桥是把已知标准量与被测量进行比较而测出被测量的值，故称为比较式测量仪器。