void eat(Tank tk)
	{
		//if(!tk.isNPC)  //Һ͵˶Գԣ߱Ƚһ
		//{
			switch(type)
			{
				case 0:{tk.addSpeed();}break;
				case 1:{tk.cutSpeed();}break;
				default:break;
			}
			tc.itemList.remove(this);
		//}
	}