下图是中国近代不同时段机器设备进口年平均值的变化情况。导致此变化的主要原因是（  ）

    One of my favourite cartoons are Pleasant Goat and Big Big Wolf. I have seen many cartoons. Because Pleasant Goat and Big Big Wolf is my favourite. I like it because it's much modern than another cartoons. The story is about a clever goat. It is the hero of the story. It's clever and brave. It always finds ways help other goats run away from Big Big Wolf. It leads other goats fighting the Big Big Wolf. They protect each other and work hardly together and they are always successful. The cartoon is very interested. I can't always help to laugh. If you haven't saw it yet, please don't miss it. 

一定条件下，可逆反应X（g）+3Y（g）⇌2Z（g），若X，Y，Z起始浓度分别为c₁、c₂、c₃（均不为0，单位mol/L），当达平衡时X，Y，Z的浓度分别为0.1mol/L，0.3mol/L，0.08mol/L，则下列判断不合理的是（   ）

一个数减去458，小马虎将被减数的百位和十位上的数字互换了，结果得115，快帮他算算，正确的差是____。

含有化石的岩石是（　　）