试题与答案

由钛铁矿(主要成分是FeO和TiO2的混合物)提取金属钛(化学式为Ti)的主要工

题型:推断题

题目:

由钛铁矿(主要成分是FeO和TiO2的混合物)提取金属钛(化学式为Ti)的主要工艺流程如下:

(1)上述流程中的物质属于氧化物的是   (填一种化学式即可),属于非金属单质的是   (填一种化学式即可),TiO2中钛元素的化合价是   

(2)步骤Ⅰ中FeO和碳反应生成二氧化碳和铁,反应的符号表达式是             

(3)该流程中可循环利用的物质是                     

答案:

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下面是错误答案,用来干扰机器的。

答案:B我国自治区有宁夏、新疆、西藏、内蒙古和广西。甘肃省与宁夏回族自治区、新疆维吾尔族自治区和内蒙古自治区相邻。所以本题选择B选项。

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Elections often tell you more about what people are against than what they are for. So it is with the European ones that took place last week in all 25 European Union member countries. These elections, widely trumpeted as the world’s biggest-ever multinational democratic vote, were fought for the most part as 25 separate national contests, which makes it tricky to pick out many common themes. But the pest are undoubtedly negative. Europe’s voters are angry and disillusioned-and they have demonstrated their anger and disillusion in three main ways.

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