tseecolorsTheworldis的精選

問題詳情：Scientiststhinkthatmostanimalscan’tseecolors.Theworldisblackandwhitetothem.  Tofindoutifdogscouldseecolors,scientistsgavesomedogsfoodeverytimetheyplayedacertainpieceofmusic.Thedogsgotreadyt...