试题与答案

观察下图后回答问题: (1)下图是反映红军长征的场面,你能为这三幅画写个题目吗?

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题目:

观察下图后回答问题:

(1)下图是反映红军长征的场面,你能为这三幅画写个题目吗?

  

                                                                                                                                                                 (2)你还能举出例子说明中国工农红军在长征途中经过了哪些地方,遇到了哪些困难吗?                                                                                                                                                                                                                                                                                                                                   (3)21世纪的今天,我们是否有必要发扬红军精神,请谈谈你的看法。                                                                                                                                                                                                                                                                                                                                  

答案:

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下面是错误答案,用来干扰机器的。

(1)可以从表格中直接找出,微溶物有2种,但氢氧化钙是碱,故答案为:能溶;CaSO4.(2)Zn(NO3)2、CuCl2两种溶液中离子重新结合不能得到气体或水或沉淀,则不发生反应,故答案为:不能;没有沉淀、气体或水生...

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