Withtheacquisitionofsmallercompaniesbylargerones,the1960'ssawawaveofnewconglomerates.
A、surgeIn1974HenryAaronbrokeBabeRuth'smonumentallifetimerecordof714homeruns.
TheeconomyofDallas,Texas,isstronganddiversified.
AlthoughtheCarbon14methodofdatingoldobjectsisnotfoolproof,itisthebestmethodavailableatpresent
Creamoftartar酒石,aweakacid,canbeaddedtoeggwhitestohelpthemfoam泡沫whentheyarebeaten
ThefirstimportantexpositionintheUnitedStateswasheldinPhiladelphiain1876.