Bats fly, rather than glide, and thus are the only mammals capable of true flight.
A、straightC
暂无解析
Alligatorsstillexistinsomeofthedank潮湿swampsandbayous小海湾ofAlabama'scoastalregions.
Themegaphone(microphone)makesthevoicesoundlouderbecauseitpointssoundwavesinonedirectionandkeepsthemfromspreadingoutinalldirections.
Whencarbonisaddedtoironintheproperproportions,theresultissteel.
Thewheelsofthefirstroadvehicleswerefashionedfromcrudestonedisks.
Formulatedin1823,theMonroeDoctrineassertedthattheAmericaswerenolongeropentoEuropeancolonization.
