2. 外语
  3. Nowadays many scientists depend on radiocarbon for dating age-old objects. When an organism dies, the C-14 in it begins to deca

Nowadays many scientists depend on radiocarbon for dating age-old objects. When an organism dies, the C-14 in it begins to deca

admin2012-09-10  62
问题 Nowadays many scientists depend on radiocarbon for dating age-old objects.
When an organism dies, the C-14 in it begins to decay.
选项 A、Right
B、Wrong
C、Not mentioned
答案A
解析 本题的内容在最后一段第三句话中可以找到：Once an organism(有机体)dies it stops taking in carbon in any form，and the C-14 already present begins to decay．一旦有机体死亡，它就停止吸收任何形式的碳，它所含的C-14就开始衰竭。
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