编程 实现字符串反转。通过键盘接收用户输入的只包含字母和空格的字符串,将该字符串中的单词位置反转,单词之间用空格分割并且单词之间只有一个空格,前后没有空格。 例: 输入:hello world hello hello 输出:hello hello world hello
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【判断题】在ESI中,这一陈述是否正确?Papers are defined as regular scientific articles and review articles. Letters to the editor, corrections, abstracts, and retracted articles are excluded.
【单选题】As the market is _____ in need of additional quantities, we would like to _____ an order with you for the same articles and the conditions are the same as those in S/CNO. WB02017.