Rb-Sr
1.子体同位素混入的处理:a.扣除初始Sr。b.等时线法扣除初始Sr. 2.子体同位素丢失的处理:a.采集不含初始Sr的矿物b.等时线法
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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