已知旦,則=                                                 ...

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問題詳情:

已知已知旦,則=                                                 ...已知旦,則=                                                 ... 第2張,則已知旦,則=                                                 ... 第3張=                                                                        (    )

    A.–10              B.10              C.已知旦,則=                                                 ... 第4張              D.已知旦,則=                                                 ... 第5張

【回答】

 

已知旦,則=                                                 ... 第6張

知識點:平面向量

題型:選擇題

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