题目

be, do, help, call, cookShould teenagers 【1】 their parents do chores? If you want 【2】 an independent (独立的) person, or you don’t want your parents to be too tired, do chores at home.I have a classmate 【3】 Li Ting. She is the only child in her family. Her parents love her so much that they don’t let her do any chores. On weekdays she gets up, has breakfast, goes to school, has lessons, comes back home, does her homework and goes to bed. On weekends, she only plays with her friends.So she doesn’t know how 【4】 chores. One day, her father was ill in hospital. Her mother 如图所示：已知甲中装淀粉溶液，乙中装水． (1)若甲、乙室中装入液体的体积相同，对于实验开始阶段的叙述正确的是 [　　] A．水分子从甲室向乙室的扩散速度大于乙室向甲室的扩散速度 B．水分子从乙室向甲室的扩散速度大于甲室向乙室的扩散速度 C．两室中水分子的扩散速度相同 D．两室中水分子的扩散速度将越来越小 (2)对于实验进行足够长时间后的情况预测正确的是 [　　] A．最终两室水分子的相互扩散速度可以相等 B．甲室中淀粉溶液的浓度始终不变 C．甲室中淀粉溶液体积将变大，乙室中水的体积变小 D．最终扩散将停止