“江山如此多娇，引无数英雄竞折腰。……唐宗宋祖，稍逊风骚。一代天骄，成吉思汗，只识弯弓射大雕。俱往矣，数风流人物，还看今朝。”***的词《沁园春·雪》里提到了哪些历史人物。

①在方格纸中,将△ABC向下平移5个单位长度得到△A₁B₁C₁,请画出△A₁B₁C₁;

②在方格纸中,将△ABC绕点O旋转180°得到△A₂B₂C₂,请画出△A₂B₂C₂.

    There has been w recent I ret id in the food service industry toward lower fat content and less sail. This trend, which was stalled by the medical community (医学界____． a method of fighting heart has disease, has bad some unintended side ____(effect) such as overweight and heart disease—the very the thing the medical community was trying to fight.

    Eat and salt ate very important parts of a diet. They are required____(process) the food that we eat, to recover from injury and for several other bodily functions. When fat and salt____(remove) from food, the food tastes as if it is missing something. As ____result, people will cat more food to try to make up for something missing. Even ____(bad), the amount of fast food that people eat goes up. Fast food ____(be) full of fat and salt; by____(eat) more fast food people will get more salt and fat than they need in their diet.

    Having enough fat and salt in your meals will reduce the urge to snack between meals and will improve the taste of your food. However, be____(care) not to go to extremes. Like anything, it is possible to have too much of both,____ is not good for the health.

下列二次根式中，与$\sqrt{3}$是同类二次根式的是（   ）