問題詳情
1. A fossil that has one fourth the normal proportion of carbon-14 to carbon-12 is approximately _____years? (Carbon-14half life is about 5,700 years)
(A) 1,350
(B) 2,750
(C) 11,400
(D) 16,800
(E) 22,400
參考答案
答案：C
難度：困難0.25
統計：A(1),B(0),C(1),D(1),E(1)