化学与生活、生产密切相关，请用所学知识回答问题：

（1）如图是超市销售的一种食盐标签的部分文字说明，请按要求回答：

①从成分上看，食盐中除含有NaCl外还有KIO₃，KIO₃的作用是____ ；

②家庭生活中，食盐除了可以调味，还可用于____ ．

（2）炒菜时油锅中的油不慎着火，可用锅盖盖灭或放入较多的蔬菜，其目的是____ ．

读图，图中序号代表的地理事物正确的是（　　）

阅读理解，判断正误。

    A dog is walking along a road. It is a big dog. It is carrying a piece of meat. The piece of meat is in the dog's mouth. The dog is walking across a bridge now. There is water under the bridge. The water is very deep. The dog is looking into the water. It can see a dog in the water. This dog has a piece of meat in its mouth, too. The big dog is barking at the dog in the water. It wants its piece of meat, too. The big dog's piece of meat is falling into the water.