搜索 - 科创

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碘化氮感度要高于氯酸钾-赤磷硝化棉？教材说这东西能做发射药然后好奇的学生会自己做啥？堵不如疏导借用未曾有缘相识的一位前辈的话我们不该马上惩罚，指责新人的危险行为，而应该指导他们走向正确的路线（htt...

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