直线振动筛在筛选0.425~0.85mm压裂砂时,上下两层筛网的目数分别是()。A.

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问题:

直线振动筛在筛选0.425~0.85mm压裂砂时,上下两层筛网的目数分别是()。

A.上层20目、下层40目

B.上层20目、下层20目

C.上层40目、下层20目

D.上层40目、下层40目

考点:压裂操作工高级压裂操作工高级压裂操作工题库
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x-2>0的解集是 ______.

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纸火锅(见右图)在各城市悄然兴起,据了解这种纸火锅的材料 是普通的纸,白色的底衬着火锅食料,干净、醒目;纸火锅在使用时无烟、无味;不会被火点燃。

(1)纸火锅烧不着的原因是__________________。   

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Ayesha and Latisha Jones need to take a break in their own homework to help their dad, because at the age of 52, John Jones is just now learning to read.

“I was so uncomfortable and so ashamed,” he said. For many years, unable to read a menu or a bus schedule, Jones was just one of the estimated 65,000 adults in Buffalo, New York who cannot read above a 5th-grade level.

And a new study shows the problem is getting worse in many states. California, New York and Florida have all shown surprising increases in illiteracy(文盲)rates. The situation has improved in a few states, like Mississippi, Rhode Island and Kentucky. But worldwide, the United States doesn’t perform well.

Fourteen countries rank higher in reading ability than the United States, including Finland, Canada, New Zealand, Australia, Ireland, South Korea, UK, Japan, Sweden, Iceland, Belgium, Austria, France and Norway.

Back in Buffalo, a program called Read to Succeed targets the problem early, teaching preschoolers shapes, colors and letters.

“We have a lot of poverty and that means a lot of children don’t have the skills, but they have the potential(潜质),” said Helene Kramer of Read to Succeed. The theory is : you’re never too young or too old to learn.

Working with Buffalo’s literacy volunteers has given Jones a fresh start. “They gave me a chance to open a door that I could never open before,” he said. “I could never open it before, because I couldn’t read.” It’s not easy, but Jones says seeing his daughters read inspires him to try.

64. In America, which of the following states has seen an improvement in the situation of illiteracy?

A. New York.   B. Mississippi.   C. Florida.   D. California

65. Helene Kramer would probably think that _______.

A. kids should not learn to read too early

B. old people aren’t able to learn to read

C .poverty contributes to poor reading ability

D. most poor kids have difficulty reading

66. What can we know about John Jones?

A. He is very tired of learning to read.

B. He is thankful for the chance to learn to read.

C. It is easy for him to learn to read.

D. His children don’t like to help him.

67. It can be inferred from the passage that _______.

A. Canadians perform better in reading than Americans

B. American children’s ability to solve problems is quite bad

C. the illiteracy rates in New York have dropped

D. Norway ranks the lowest in reading ability

68. What might be the best title for the passage?

A. America ranks higher in reading ability.

B. volunteers help a man live a new life.

C. Reading offers more chances to children.

D. Find inspiration to fight illiteracy.

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文化与环境的关系的典型理论有哪些?其核心思想是什么?代表人物是谁?

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理财顾问服务是指财务策划、投资建议、个人投资产品分析及一般性业务咨询活动。( )

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