问题 问答题 简答题

什么是表面物理化学分选?

答案

参考答案:利用物料颗粒间的表面物理化学性质差异来进行分选,称为表面物理化学分选。目前,表面物理化学分选方法中应用最广泛,也是最重要的是浮选。浮选是利用矿物表面物理化学性质差异,(特别是表面润湿性)在固-液-气三相界面,有选择性富集一种或几种目的物料,从而达到与废弃物料分离的一种选别技术。

阅读理解

阅读理解。

    

      I hate being overweight. My husband said he didn't mind, but I knew he still hoped I had a beautiful body.

Everything from my waist (腰部) to my legs was overweight. Finally, just after Christmas last year, I decided

that something had to be done.

     I met Dr. Wallace, and she told me I had to stop eating fast foods. It was very hard for me because I was

eating them three of four times a week: pizza, hamburgers, whatever I could get. But I said to myself at the

start that I would try my best to do it-and I did. I even gave up the booze-something I used to have two glasses of it with dinner.

     My best friend, Rachel Waterman, said I had to walk 10,000 steps every day. That was very hard for me

at the beginning. I was used to driving everywhere, but I started to walk everywhere instead. I walked in the

morning before work, and I usually took a walk in the park with my husband after work. Now I never go to

bed until I've done my 10,000 steps.

     Six months has passed, and I made it. Last week, my husband bought me an MP4 as a gift. the weight is

wonderful-I feel like a different person now, and I can buy my favorite clothes in the shops. I am so proud

of myself because everyone thought I wouldn't be able to make it including myself.

     I love my new body, and I'll never let myself go back into my old ways.

1. When did the woman decide to lose her weight?

A. After she had a baby.

B. After Christmas last year.

C. Before Christmas last year.

D. When she got a gift from her husband.

2. The underlined word "booze" in Paragraph 2 means ________.

A. wine

B. meat

C. vegetables

D. fast foods

3. What can make the woman overweight according to this passage?

A. Pizza, vegetables and wine.

B. Pizza, hamburgers and wine.

C. Pizza, vegetables and water.

D. Pizza, hamburgers and tea.

4. Why did the woman's husband get an MP4 for her?

A. Because it was Dr. Wallace's suggestion.

B. Because her husband liked it.

C. Because it was a gift for her success in losing weight.

D. Because she asked her husband for it several times.

5. Who helped the woman lost her weight?

A. Dr. Wallace.

B. Her husband.

C. Rachel Waterman.

D. All of the above.

多项选择题