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

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

admin2010-01-16  85
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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本试题收录于： 职称英语理工类B级题库职称英语分类
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