Jack is discussing the game with his friends when I get there.
如图所示,小强用手电筒把光照在自己脸上,小丽手拿透镜和他一起配合,他们在模拟( )
某养禽专业户养的鸡比鸭多 14 ,则鸭的只数相当于鸡的只数的____%.