问题 填空题

硫在氧气中燃烧,看到的现象是:______.实验开始前应先在集气瓶底部装少量的______,防止______.写出该反应的文字表达式:______.该反应属于______反应.(填一种反应类型)

答案

硫在氧气中燃烧的现象是:发出明亮的蓝紫色火焰,放出热量,生成有刺激性气味的气体;实验开始前应先在集气瓶底部装少量的水,用来吸收生成的二氧化硫,防止污染空气;硫和氧气点燃生成二氧化硫,反应的表达式是:硫+氧气

点燃
二氧化硫;该反应由两种物质反应生成一种物质,属于化合反应;

故答案为:发出明亮的蓝紫色火焰,放出热量,生成有刺激性气味的气体;水;生成物二氧化硫扩散到空气中,污染空气;硫+氧气

点燃
二氧化硫;化合.

阅读理解

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?

    ______________________________________________.

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