单选题 下列代码段执行后,season的值为( ) int month = 3; String season = ""; switch(month){ case 12: case 1: case 2: season = "winter"; break; case 3: case 4: case 5: season = "spring"; break; case 6: case 7: case 8: season = "summer"; break; case 9: case 10: case 11: season = "autumn"; break; }