如图甲是小明同学安装好的直流电动机模型：

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科学课上，老师告诉学生“能发生复分解反应的两种盐通常是可溶的”．有“通常”就有“例外”，能否找到某些可溶性盐和难溶性盐发生复分解反应的证据呢？科学兴趣小组进行了探究．

【查阅资料】①水溶液中的复分解反应一般朝着溶液中离子浓度（单位体积溶液中离子数目的多少）减少的方向进行．

②了解到某些难溶性盐的溶解能力和颜色．

【实验取证】取一支试管，加入少量AgNO₃溶液，再加入过量NaCl溶液，有白色沉淀生成．

再往该试管中加入少量KI溶液，白色沉淀转化为黄色沉淀．

【分析讨论】( 1 )为什么要加入过量的NaCl溶液？请说明理由．____

( 2 )写出加入少量KI溶液后发生反应的化学方程式．____

( 3 )该反应能发生的原因是AgI在水中的溶解能力____AgCl（选填“大于”、“等于”或“小于”）．

【得出结论】某些可溶性盐和难溶性盐之间能发生复分解反应．

水资源丰富的地区不包括下列哪个地区（   ）

    Today I'd like to tell you something about two Chinese festivals.

    The first one is the Mid-Autumn Festival. It is a time for the 1. At night, the whole (全部的) family 2  delicious moon cakes (月饼), and the parents 3 the story of Chang'e. It's a traditional 4 story.

    The second (第二的) one is the Lantern Festival. 5  that day, we eat yuanxiao —a kind of rice dumpling. It's really 6 and I love it very much. We make many kinds of lanterns 7  for the festival. You can see a lot of pictures on 8 some are funny 9 The tiger is my favourite. Well, it likes eating much meat. But I don't want to 10 from it. I want to be healthy.