DoubleEagleinthefirsttransatlanticballoon,wasgreetedbyavidcrowdsinFrance.
Thefactthatsomanypeoplestillsmokeinpublicplace_______thatwemayneedantionwidecampaigntoraiseawarenessoftheriksofsmoking.
Batsfly,ratherthanglide,andthusaretheonlymammalscapableoftrueflight.
马斯洛认为，人类需要从低到高依次为()。