Fromoldtimes，crows（乌鸦）havebeenfamousfortheircleverness...
问题详情： Fromoldtimes，crows（乌鸦）havebeenfamousfortheircleverness.Theyusetools，workoutproblems，andevenenjoyplaying.Scientistshavestudiedcarefullyhowcrowsgoabouttheseactivities. Tomaketools，crowscutoffleav...