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| 所有積分大於負-100的壞孩子,將可獲得重新機會成為懲罰生,權限跟幼兒生一樣。 Thanks for sharing...
There are some parts that actually get my attention and i would like to share something relate to the carbon-14 dating....
1) First, carbon-14 cannot be used to date biological artifacts of organisms that did not get thier carbon dioxide from the air. This rules out carbon dating for most aquatic organisms, because they often obtain at least some of their carbon from dissolved carbonate rock. The age of the carbon in the rock is different from that of the carbon in the air and makes carbon dating data for those organisms inaccurate under the assumptions normally used for carbon dating. This restriction extends to animals that consume seafood in their diets, as well. This explain why (經過防腐保存的海狗死了30年,碳-14年代測定法卻斷定它有4,600年之久,這是1971年《美國南極雜誌》(Antarctic Journal of the United States)第6期的報道) ...
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