金文和甲骨文最大的差别是（    ）

***在1957年赴苏访问期间指出：“事情很明显，在十月革命以后，各国无产阶级的革命家如果忽视或者不认真研究俄国革命的经验，不认真研究苏联无产阶级专政和社会主义建设的经验，并且按照本国的具体条件，有分析地、创造性地利用这些经验，那末，他就不能通晓作为马克思主义发展新阶段的列宁主义，就不能正确地解决本国的革命和建设的问题；那末，他就会陷入教条主义的错误，或者陷入修正主义的错误。”这反映出（    ）

根据材料内容，选择正确答案。

Dear Frank,    

    Thank you for your postcard. I'm very glad you are having a good trip now. Ottawa is very beautiful in May. I hope I will have a chance to go there one day.

    Our summer holidays will start next month. I enjoy my summer holidays, although(虽然)it's hot at that time in America. During summer holidays，I can swim in the sea and go fishing. It's so cool. And I am going to our hometown near Chicago with my sister Linda，and my parents agree(同意). Our uncle lives  there，so Linda and I can stay with him.

    We are not going to take a plane. We are going there by train. I am going to fish there. And Linda likes painting. She is going to do some painting there. I'm sure we'll have a good time.

                                                            Sincerely,

                                                              Jack