①1922年墨索里尼等法西斯党徒向罗马进军，法西斯政权在意大利建立起来

②1933年希特勒开始执掌德国大权，其统治下的纳粹党建立法西斯专政

③1936年，日本受军部控制的广田弘毅上台组阁，建立法西斯专政

④9380年，英、法两国为了保护本国利益，牺牲捷克斯洛伐克，纵容德意两围

    When children are faced with problems, they may not be able to deal with them. Children need to learn how to solve problems. You can help them to learn it. The best way is to take the time to talk about problems as they happen. Of course, this is not easy to do. Problems have a way of bursting upon (突然发生) someone at the worst time. But even if the time is not the best, you should try to help.

    There are many things you can do to help children learn problem-solving skills. One of the good ways is to find out what made the problem happen. This is a skill that children won't learn without help. A child may knock over a glass of milk at the dinner table, but he may not realize that the glass was too close to the edge. You can show the child what the problem is. Then it can be solved.

    The next step for children is to learn how to solve the problem alone. This step takes courage. Some of them are so afraid of being wrong that they cannot solve problems. You can help them by talking about some possible answers. You and the child can decide which answer is the best. Let the children try it out. Now the children will see that problems can be solved, and you can praise them for choosing a good answer.

    Another step to problem-solving is to help children see the laws of cause and effect (因果规律). If a glass is knocked over, it will fall and break. If children might like to write on the wall, the pencil always leaves a mark. Soon the children will see the link (链接) between cause and effect, and then they are on the road to growth. When children see someone else knock over a glass, they now know that it will break. When they see writings on the wall, they can tell how it got there.

    The ability to solve problems is not easy for children to learn. It is not easy for adults either. It takes patience for you, and it takes practice for the child. But problem-solving can be taught. All you need is time and effort.

下图装置是做CO与Fe₂O₃反应的实验的部分装置。下列有关说法错误的是
 　

①将稀盐酸分别滴入试管甲和乙中，如图所示；

②将反应后甲、乙试管中的废液倒入一洁净的烧杯中，观察到先有气泡产生，后有白色沉淀生成，过滤   后得到白色沉淀和无色滤液；

③取少量滤液于试管中，滴加少量碳酸钠溶液，无明显现象；

④取少量滤液于试管中，滴加少量盐酸，有气泡产生。则②的无色滤液中（   ）

阅读材料,回答问题。

2018年8月31日,备受关注的《中华人民共和国电子商务法》经第十三届全国人大常委会第五次会议表决通过，于2019年1月1日起正式施行。

第十三届全国人民代表大会常务委员会第五次会议修订的《中华人民共和国个人所得税法》,于2019年1月1日起正式施实施。

2019日年起3月15日,十三届全国人大二次会议表决通过了《中华人民共和国外商投资法》,将于2020年1月1日起施行。