Nowadays many scientists depend on radiocarbon for dating age-old objects. The half-life of C-14 is about 25,000 years.

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问题 Nowadays many scientists depend on radiocarbon for dating age-old objects.
The half-life of C-14 is about 25,000 years.

选项 A、Right
B、Wrong
C、Not mentioned

答案C

解析本文并没有直接提到C-14的寿命有多长。

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职称英语理工类C级

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