My name is Eric Green. I ____ a student. I have a sister.____ name is Lucy Green. She is a student, too. I can play tennis, but not ____.Lucy ____ sports ,too. She ____ tennis every Sunday. Lucy and I both like ____ food. She likes salad and ____.I like ____ carrots very much. So, we like vegetables and we eat____ a lot every day, because we____they are healthy.

比一比，再组词

根 ____ 跟 ____

板____反____

斯塔夫里阿诺斯在《全球通史》中写道：“旧制度所显示的破产导致旧制度的变革．第一个变革是解放农奴……这是俄国历史上的一个重大转折点……工厂工人的数目从1865年的381000人上升到1890年的1620000人……”材料显示这次改革（    ）

已知： （R、R′、R^″代表烃基或氢）