两枚正四面体骰子的各面上分别标有数字1，2，3，4，现在同时投掷这两枚骰子，并分别记录着地的面所得的点数为a、b．

（1）假设两枚正四面体都是质地均匀，各面着地的可能性相同，请你在下面表格内列举出所有情形（例如（1，2），表示a=1，b=2），并求出两次着地的面点数相同的概率．

（2）为了验证试验用的正四面体质地是否均匀，小明和他的同学取一枚正四面体进行投掷试验．试验中标号为1的面着地的数据如下：

请完成表格（数字精确到0.01），并根据表格中的数据估计“标号1的面着地”的概率是多少？

采撷众多与中秋节有关的文化．其主要蕴含和表达了“家”与“国”的情怀，作为文化基因的纽带、“家国情怀”的相承，中秋节承载着深厚的故乡情、家国情。作为中华民族重要的传统节日之一，中秋节（    ）

①具有浓厚的历史文化底蕴，承载着人伦孝悌的血脉亲情

②包含着生活中的民族风土人情，反映了民族团结和国家统一的愿望

③是民族历史文化成就的重要标志和人类社会发展的见证

④蕴藏丰富的文化内涵，展现了中华文化源远流长的特征

 Let's try doing the following experiment.

 What to do：

 Use string to hang a paper clip or other small object at about chest（胸部）level.

 Pick up a stick，such as a broom handle. Take three or four steps away from the paper clip.

 Now close one eye and walk toward the paper clip. Try to touch it with the tip of the stick. If you miss，try again，still keeping one eye closed. Now try it with both eyes open and see if it’s easier to do.

 How it works：

 In the experiment，you have to judge how far away the paper clip is. Your brain has several ways of doing this.

 One simple way depends on how much your eye has to focus（聚焦）itself. Using only one eye，most people will find it difficult to touch the paper clip on the first try，but the brain still gets some information about distance—though not much.

 Your brain can judge distance much better when you look at something with both eyes. In fact，your brain has more than one way to use both eyes in judging distance. For example，to see anything clearly，you have to make both of your eyes point at the object. When you look at a nearby object，your eyes turn inward. You can feel this happening if you look at the tip of your finger and move your finger toward your nose.

 Your brain gets information from the eyes about how much they are pointing toward each other. Using that information，the brain can tell how far away any object is，whether it is a basketball or a paper clip.