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> 已知旦,则=                                                 ...

已知旦,则=                                                 ...

问题详情:

已知已知旦,则=                                                 ...已知旦,则=                                                 ... 第2张,则已知旦,则=                                                 ... 第3张=                                                                        (    )

    A.–10              B.10              C.已知旦,则=                                                 ... 第4张              D.已知旦,则=                                                 ... 第5张

【回答】

 

已知旦,则=                                                 ... 第6张

知识点:平面向量

题型:选择题

标签: 已知
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