正弦规

期货公司处理其代理客户的指令有两种方式，既可以在交易所集中撮合交易，也可以由期货公司内部对冲。( )

阅读理解。

     I'm Joan Croft. I must have to say that I came into nursing by chance. I didn't really like my first job,

which was office work. It was all right-but that's just about all you can say about it. I stayed in the same

place with the same people around me all day and every day. Then I became a singer, which I enjoyed

very much. But after a while the singing group broke up (解散) and I had to start looking for something

else.

     Some girls have wanted to be nursed ever since they were children, but it never entered my head until

I saw an advertisement in a paper. I wrote in and thought. "Oh, well, I will give it a try." One thing I liked

about it was going away from home.

     The training itself is very interesting and most of it is just on the wards (病房), so that you very

quickly begin nursing real patients.

     I lived in the nurses' home when I arrived and I had my own room, which was very nice.

     I like nursing more than I ever thought I would. I'll always carry on nursing. I have got a boy friend,

who is a doctor, so I hope to get married sometime, but wherever I live there's sure to be a hospital in

the place and there is always a job for a nurse.

1. What was Joan's first job?

    ______________________________________________.

2. Why didn't Joan like her first job?

    ______________________________________________.

3. Why didn't Joan go on with her second job?

    ______________________________________________.

4. How did Joan find out the information about the nursing job?

    ______________________________________________.

5. What was Joan's plan for the future?

    ______________________________________________.

图中两灯泡并联，开关S是总开关，电流表A₁只测通过L₁的电流，A₂只测通过L₂的电流。

当归补血汤的方药配伍体现（）
金匮肾气丸的方药配伍体现（）

A.阴中求阳

B.填精化血

C.补气生血

D.壮水制火

E.滋水涵木

食物调节不属于种群自动调节机制。 ( )