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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DoubleEagleinthefirsttransatlanticballoon,wasgreetedbyavidcrowdsinFrance.
InthenortheasternUnitedStates,itrainsintermittently間歇地throughoutthespring.
Amythical(imaginary)creature,thedragonwasbelievedtohavelion'sclaws,scalyskin,andfierybreath.
Bythenineteenthcentury,embroideryonmen'sclothinghadvirtuallydisappearedexceptfortheoccasionaldecorativevestandtie.
Eyespots,themostrudimentaryeyes,arefoundinprotozoan原生動物flagellates鞭毛蟲,flatworms扁形蟲,andsegmentedworms片段蠕蟲.
