问题描述：
The relative atomic mass scale makes it possible to know how many atoms of an element are element
接上面 are present in a sample of the element with a measurable mass.这句话的句子成分怎么划分啊?
接上面 are present in a sample of the element with a measurable mass.这句话的句子成分怎么划分啊?
问题解答：
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