【判断题】【消耗次数：1】
方程个数等于未知量个数的线性方程组一定有唯一解.
①
正确
②
错误
参考答案：
复制
纠错
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coach
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forsake
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foster
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than more on efficiency
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and more on efficiency
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in advance
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ahead of
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above al
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right away
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Nancy was surprised that they have ____. They
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split up
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fallen through
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knocked out
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which
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it being completed
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