Although the Carbon 14 method of dating old objects is not foolproof , it is the best method available at present
A、whollyoperationalC
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Alligatorsstillexistinsomeofthedank潮濕swampsandbayous小海灣ofAlabama'scoastalregions.
Someseaurchins海膽havevenomous(toxin)spines
In1861itseemedinevitablethattheSouthernstateswouldbreakawayfromtheUnion.
Peoplewhodonotsleepenoughtendtobecomeirritable.
TheNativeAmericaninterpreterSacajaweawasavaluablememberoftheLewisanddarkexpeditionin1805.
