把3mol铜粉投入含4mol硝酸和1mol硫酸的稀溶液中，则标准状况下放出的气体

--- Is Mr. Smith in the office?

--- Yes，_____ he is in charge of the office，he must be there.

A．however

B．since

C．whether

D．for

（9分）(1)下图是维生素A的分子结构

①维生素A中的官能团名称是                ，               

②1mol维生素A最多能与                  mol溴反应。

③试指出维生素A可能发生的化学反应（写出反应类型，任写两种即可）

                           ：                               

(2)系统命名：(CH₃)₂ C(OH)CH₂CH₃                                       它的H-NMR谱中有              个峰，此化合物在浓硫酸作用下发生消去反应，生成的有机产物的结构简式：                                                                  

阅读理解。

     Michael is the kind of guy you love to hate. He is always in a good mood and always has something

positive to say.

     One day I went up to Michael and asked him, "I don't get it. You can't be positive all the time. How do you do it?" Michael replied, "Each morning I wake up and say to myself  'Mike, you have two choices

today. You can choose to be in a good mood or you can choose to be in a bad mood.' I choose to be in a good mood. Each time something bad happens, I can choose to be a victim or choose to learn from it. I

choose to learn from it. Every time someone comes to me complaining (抱怨), I can choose to accept

their complaining or I can point out the positive side of life. I choose the positive side of life."

     I often thought about that when I made a choice about life. Several years later, Michael was involved in a serious accident, falling off 60 feet from a communication tower. After l8 hours of operation, and weeks of intensive care, Michael was released from the hospital with rods placed in his back. I asked him what

had gone through his mind as the accident took place.

     "The first thing that went through my mind was the well being of my soon-to-born daughter," Michael

replied. "Then, as I lay on the ground, I remembered I had two choices: I could choose to live or I could

choose to die. In the operation room, I told the doctors and nurses, 'I'm choosing to live. Operate on me

as if I am alive, not dead'."

     Michael lived, thanks to the skill of his doctors, but also because of his amazing attitude.

1. The underlined sentence in Paragraph 1 really means that Michael is a person _____.

A. people would fall in love with          

B. people would easily get tired of

C. people would envy for his positive life attitude

D. people wouldn't take seriously

2. Each time something bad happens, Michael chooses to _____.

A. be in a good mood              

B. learn from it

C. complain about it              

D. ignore the negative side of it

3. From the passage we can infer that _____.

A. most people manage to lead a positive life at any time

B. most people can't lead a positive life at any time

C. only Michael can be so positive            

D. the author is always a sad person

流砂的防治途径主要是（）动水压力或（）动水压力的方向。

流行性腮腺炎并发睾丸炎主要病变的经脉是（）

A．心经

B．肝经

C．脾经

D．胆经

E．肺经