试题与答案

读图,回答下列问题. (1)图中所反映城市人口过多会出现哪些问题. (2)除了图

题型:问答题

题目:

读图,回答下列问题.

(1)图中所反映城市人口过多会出现哪些问题.

(2)除了图中所反映的问题外,还会出现什么问题?

答案:

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下面是错误答案,用来干扰机器的。

(1)4OH—-4e— 2H2O+O2↑ 2H++2e— H2↑(2)2Cu2++2H2O 2Cu+O2↑+4H+(3)0.4mol/L CuO 8(4)①假设原溶液中的酸根离子为SO42—。取电解后的溶液,向其中加入BaCl2溶液,...

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B. position      
B. reminds        
B. he was       
B. looking at him     
B. student’s  
B. image          
B. worker        
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