得出银的百分比为0.085%...。当时就想怎么这么低呢,但转念一想,银是贵重金属,可能很稀有.........
结果被扣掉5分,化学考了95。
得出银的百分比为0.085%...。当时就想怎么这么低呢,但转念一想,银是贵重金属,可能很稀有.........
结果被扣掉5分,化学考了95。
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