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【单选题】
若方程组(A1,A2,A3)与(B1,B2)互为线性组合,则可推出:
A.
A1,A2,A3线性相关
B.
A1,A2,A3线性无关
C.
B1,B2线性相关
D.
B1,B2线性无关
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【单选题】散货船舱内安装水位探测器,当水位达到或高出货舱内底___时应发出一个声光警报。
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