下列属于纯净物的是（   ）

下列常见的商家用语中，属于侵犯消费者合法权益的有(      )

①公平交易童叟无欺   ②本酒店谢绝自带酒水

③顾客就是上帝          ④售出商品，概不退换

    I like school days. I can learn many things from school. We have four classes in the morning and two in the afternoon. I like weekends, too. We don't go to school on Saturdays and Sundays. I often play ping-pong and play basketball on Saturday morning. I often play the violin (小提琴) on Saturday afternoon. I often do homework and play football on Sunday morning. I often go to the park on Sunday afternoon.

下表是某年我国南．北方地区水土资源分配数据表，我国南、北方地区水土资源分布特点是（     ）。

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