Gaokao Math Practice Question
已知非零向量 $\vec{a}, \vec{b}, \vec{c}$, 则“ $\vec{a} \cdot \vec{c}=\vec{b} \cdot \vec{c}$ ”是“ $\vec{a}=\vec{b}$ ”的 ($\quad$)
- A.充分不必要条件
- B.必要不充分条件
- C.充分必要条件
- D.既不充分又不必要条件
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