It was at the very beginning____ Mr.Smith madea decision ___we should send for a

It was at the very beginning____ Mr.Smith madea decision ___we should send for a doctor.

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如图,在△ABC中,AC=4,∠A=60°,∠B=45°,BC边的垂直平分线DE交AB于点D,连接CD,则AB的长为_________________.

如图,在△ABC中,AC=4,∠A=60°,∠B=45°,BC边的垂直平分线DE交AB于点D,连接CD,则AB的长为_________________.

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