下列哪一项不是社会主义初级阶段基本路线的内容（    ）

    Mr. Brown lives on Green Street now. He wants to send a postcard(寄明信片) to his pen friend in Toronto, but he doesn't know where the post office is. “ where is the post office？” he asks his new neighbor Joe. “I want to send a postcard to Toronto.” “The post office is quite far from here，” answers Joe. “If you only want to post some letters(信件) or postcards, you needn't go to the post office. You can put them into a mailbox（信箱）down the street.”

***生前写了不少诗词，每一首背后都有一件甚或数件中国近现代史上惊天动地的大事。下列诗句所反映的重大事件，发生在解放战争期间的是（    ）