试题与答案

简述语言障碍的分类。

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题型：问答题 简答题

题目：

简述语言障碍的分类。

答案：

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( )1. A. talk about    
( )2. A. what          
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C. library    
C. how to     
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C. looked for 
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C. She        
C. except     
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题型：填空题

已知Cl2通入水中形成的溶液叫氯水。发生的反应为：

Cl2 + H2O =" HCl" + HclO（次氯酸）、  2HClO   2HCl + O2↑。

（1）HClO中氯元素的化合价为             。

（2）将氯水在阳光下照射一段时间后，溶液中的溶质是            （填化学式）。任写一个体现该溶液化学性质的方程式：                                       。

（3）往新制氯水中放入一小块红色布条，一段时间后观察，红布条褪色。请对此现象进行探究（只需提出假设、方案，不需要说出方案实施的具体结果）。

假设一：生成的HClO使红布条褪色

方案一：往新制备的HClO溶液中放入一小块红布条，一段时间后观察布条颜色变化。

假设二：                                                                  。

方案二：                                                                  。

假设三：                                                                  。

方案三：                                                                  。
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