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6,对于两两不互质的正整数$m_{1},m_{2},...,m_{k}$且$(m_{1},m_{2},...,m_{k})≠1$,则关于同余方程组$x≡a_1 (mod m_1)$$x≡a_2 (mod m_2)$......$x≡a_k (mod m_k)$下列哪种情况方程组有解( )。
A $\left (a_{1} ,a_{2},\dots ,a_{k} \right )= \left (m_{1} ,m_{2},\dots ,m_{k} \right ) $ ,则方程组有解
B $\left (a_{1} ,a_{2},\dots ,a_{k} \right )\ge \left (m_{1} ,m_{2},\dots ,m_{k} \right )$ ,则方程组有解
C 对$∀i≠j$满足$|a_{i}-a_{j} |=[m_{i},m_{j} ]$
D 对$∀i≠j$满足$|a_{i}-a_{j} |=[m_{i}- m_{j} ]$
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