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在化学分析与环境监测的广阔领域里，精准的pH值测量是基础中的基础。多年的实验室工作经验告诉我，一个微小的pH偏差，都可能对实验结果产生重大影响。而氢氧化钙pH溶液标准物质，正是那把确保我们测量准确无误
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作为 90 年代乔丹与公牛的劲敌之一，“手套” 佩顿和 “雨人” 坎普的西雅图超音速成为一代人的记忆。但其实，在那个运动实力横行的年代，也有其他的运动猛将视乔丹为对手，只不过，在他强劲的实力面前全部都
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