钢水氧化性和哪些因素有关?

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问题:

钢水氧化性和哪些因素有关?

考点:钢铁冶金考试钢铁冶金考试题库
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New rules and behaviour standards (行为规范) for middle school students came out (颁布) in March. Middle schools are going to use a new way to decide who the top students are. The best students won’t only have high marks. The following are some of the new rules.

Tell the truth. Have you ever cheated (作弊) in an exam? Don’t do it again! That’s not something honest students should do.

Do more at school. Good students love animals and care for other people. April is Bird Loving Month in China. Is your school doing anything to celebrate it? You should join! In that way, you can learn more about animals and how to protect them.

Be open to new ideas. Have you ever thought people could live on the moon? Maybe you’ll find another earth in space in the future. Everyone’s new ideas are important.

Protect yourself. Has a thief ever taken money from one of your classmates? Don’t let it happen to you. If you have to go back home late, you should let your parents know.

Use the Internet carefully. The Internet can be very useful for your study. But some things on the Internet aren’t for kids, so try to look at the good web pages. You can use the web pages for fun or homework.

1. When did the new rules and behaviour standards for middle school students come out?

_________________________________________________________________________.

2. What should the best students do in an exam?

_________________________________________________________________________.

3. What should you do if you have to go back home late?

_________________________________________________________________________.

4. What can the children use the good web pages for?

_________________________________________________________________________.

5. What is the right attitude(态度) to new ideas?

_________________________________________________________________________.

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下图是珠穆朗玛峰地区南、北坡垂直自然带谱示意图。与北坡相比,南坡自然带丰富的原因是

A.坡向朝南,纬度高

B.相对高度大,纬度低

C.坡度大,纬度低

D.海拔高,降水多

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有关遗忘综合征,下列哪种说法正确()

A.以远事记忆障碍为特征

B.常见病因为一氧化碳中毒

C.为一种半侧脑功能障碍

D.一种选择性或局限性认知功能障碍

E.以对既往经历的全面丧失为特征

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人的素质结构有三个相对独立的基本要素是______、______、身体素质。

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读右图,回答下列题:

若此图为等高线,则:()

A.沿a、c线能发育河流

B.沿b、d线成为河流的分水岭

C.该区域的地势起伏不大

D.a、c两地的气温差与b、d两地的气温差接近

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