试题与答案

请对复合物理场分选原理进行概述？

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题型：问答题 简答题

题目：

请对复合物理场分选原理进行概述？

答案：

参考答案：

现作用力方向偏转或反向途径有三：

①采用复合力场。

②调节分选介质。

③调节颗粒的表面性质。

复合力场是用离心力场强化重力场；用惯性振动力场迭加到重力场、磁场；用磁场和电场强化重力场等。

考点：矿物加工学资源加工学资源加工学题库
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These amazing animals prove that love lives on four legs.

A little girl's lifeline

Three-year-old Alida Knobloch and her 27kg golden dog, Mr. Gibbs, are almost together all the time There is a special love between them. Alida, who suffered from serious lung disease (肺病) when she was 10 months old, is unable to breathe on her own for about 45 minutes. So Mr. Gibbs has been with her everywhere, carrying 4.5kg of oxygen tanks (氧气罐) for her .

A pig that calms kids

When Lois Brady, a famous doctor in America, visits special-needs students in San Francisco schools, she often brings along Buttercup, a black pig from Vietnam. The pig is very calm and friendly and has been trained to offer comfort (安慰) to patients as well.

A Lion's big heart

With paws (爪子) the size of dinner plates, bright black eyes and a golden mane (鬃), Jupiter, a 13-year-old 250kg lion, was brought to the rescue (援救) center by Anna. In the past two years, Anna has developed a very close relationship with Jupiter.

小题1:The best title to explain the main idea of the text is “_________”

A. Hero pets                           B Small pets          

C. Kids' friends                       D Special visits

小题2:Which of the following do you think is the right match?

A．Alida →a lion

B．Buttercup →a pig

C．Lois →a sick girl

D．Jupiter → a doctor小题3:How long has Mr,Gibbs been with Alida?

A．For about 45 minutes

B．For about 10 months

C．For over 3 years

D．For over 2 years小题4:In which of the following pictures can you find Anna?

小题5:Which of the sentences is Not true according to the passage?

A．Alida has suffered from serious lung disease since she was 10 months old

B．The black pig can calm the kids and offer comfort to them.

C．Mr. Gibbs is a loyal(忠诚的) dog which loves its owner.

D．Anna brought Jupiter to the rescue center for fun.
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