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Câu hỏi:
It is implied in the passage that ____________.
- A. carbon dating has no known uses outside of archeology
- B. fossils cannot be age-dated using carbon-14
- C. carbon dating could not be used on an item containing nitrogen
- D. carbon-14 does not have the longest known half-life
Lời giải tham khảo:
Đáp án đúng: D
Đáp án D.
Đoạn văn ngụ ý rằng ...............
A. phương pháp xác định niên đại bằng các-bon không được biết đến ngoài ngành khảo cổ học.
B. hóa thạch không thể xác định được niên đại bằng cách sử dụng carbon-14.
C. phương pháp xác định niên đại bằng cácbon không thể sử dụng trên vật có chứa ni-tơ.
D. carbon-14 không có chu kỳ bán rã dài nhất được biết đến.
Từ Question 48 ta suy ra vẫn còn có chất khác có chu kì bán rã dài hơn carbon-14 để xác định được niên đại của những cổ vật trên 80,000 tuổi.
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