这里有一个表格，反应最强的在顶端，反应最弱的在底部。

Here is a table with the metals that react most at the top, and the metals that react least at the bottom.

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第四步：在黑板上画一个三栏表格，每栏顶端写上习语的类别，如动物习语、食物习语和衣服习语。

Step 4: Make three columns on the blackboard. At the top of each column, write the name of a different category of idioms, such as animal idioms, food idioms and clothes idioms.

youdao

第四步：在黑板上画一个三栏表格，每栏顶端写上习语的类别，如动物习语、食物习语和衣服习语。

Step 4: Make three columns on the blackboard. At the top of each column, write the name of a different category of idioms, such as animal idioms, food idioms and clothes idioms.

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