A．Ⅰ→Ⅲ→Ⅱ→Ⅳ                                     B．Ⅳ→Ⅱ→Ⅲ→Ⅰ

C．Ⅰ→Ⅲ→Ⅳ→Ⅱ                                     D．Ⅳ→Ⅱ→Ⅰ→Ⅲ

  • 答案
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