钢铁腐蚀发生得最普遍的是 ( )_刷题宝

题干

钢铁腐蚀发生得最普遍的是 ( )

A：化学腐蚀

B：析氢腐蚀

C：吸氧腐蚀

D：摩擦

上一题下一题 0.0难度选择题更新时间:2014-04-24 05:10:19

答案(点此获取答案解析）

C

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下列各句，没有语病的一句是（）

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读一读，写一写。

Sally: Today is Mother's Day. I love my mum. I can buy some flowers for her. What about you, Ken?
Ken: I love my mum too. I can make a photo frame for her. I can say" Happy Mother's Day!" to her. What about you, Linda?
Linda: I like singing. I can sing a song for her. I can give her some lemons.
Today is ____. Sally can ____ for her mum. Ken can ____ for his mum and say "Happy Mother's Day!" to his mum. Linda can ____ for her mum. She can give her mum some lemons too.

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李华同学到文具店为学校美术组的40名学生购买铅笔和橡皮，已知铅笔每支m元，橡皮每个n元，若给每名同学买3支铅笔和5块橡皮，则一共需付款（）元．

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在等差数列{2﹣3n}中，公差d等于（）

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根据下图回答问题。

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