如图：⊙O的直径AB=12，AM和BN是它的两条切线，DE切⊙O于E，交AM于D，交BN于C，设AD=X，BC=Y，求Y与X的函数关系式，并画出它的大致图象．

    Living a more simple life can improve how we think, feel and move around in the world. Here are ways to simplify your life while creating space for happiness.

    Give up your negative thoughts. As humans, we spend a lot of our time being caught up in negative thoughts that brings nothing good into our lives.____ They can grow rapidly and cause unhappiness and do nothing to improve our quality of life.

    Reduce the amount of screen time____ While watching TV and endless YouTube videos or playing computer games can be a nice way to relax, too much can have a negative influence on your lives.

    Cut down on social media____ They say they feel less confident after comparing their lives against those of their online friends. So simplify your life by cutting down on social media-not only for your own health of mind but to stop the endless checking every several minutes.

    ____ In the effort to make yourselves better people and improve yourselves, you often set goals but having too many goals can prevent you from achieving them.

    Eat Fewer Unhealthy Foods____Cutting down on bad foods will not only help you feel much better and give you more energy.

A. Reduce the number of your goals.

B. Negative thoughts are much dangerous.

C. Many people feel their lives are worsened by it.

D. You can make your own healthy food and tasty meals.

E. Learn to choose to think and see the positives in life.

F. Make an effort to remove some unhealthy foods from your diet

G. We spend so much time either staring at a computer or the TV.

人类能卷舌和不能卷舌这对相对性状中，决定能卷舌的基因（B）是显性，决定不能卷舌的基因（b）是隐形，现有一对夫妇一方能卷舌，另一方为不能卷舌，他们生下不能卷舌的小孩，请问：这对夫妇的基因组成是（　　）

                                                             The advantages of Eating Fruits & Vegetables
      Vegetables and fruit are good for your health because of a lot of vitamins, nutrients(矿物质) and fiber（纤维）in them. Fruits and vegetables are regarded as a healthy diet without adding chemicals or additives（添加剂） for carrying or storing foods. The United States Department of Agriculture suggests eating plenty of fruits and vegetables every day to get the advantages of eating a healthy diet.
Disease Prevention
       The United States Department of Agriculture tells that eating fruits and vegetables helps fight strokes, cardiovascular disease and type 2 diabetes. Because of the potassium in fruits and vegetables, they can prevent the risk of developing kidney stones. The fiber in fruits and vegetables helps the body fight against coronary heart disease.
Idea Health
      Since fruits and vegetables add to a balanced and healthy diet, eating these will help you with your idea. The vitamins in fruits and vegetables helps fight depress（沮丧）, according to the Mental Health Foundation. Vitamin B and folic acid found in some vegetables and bananas help you to relax. Eating fruits and vegetables can also help improve memory.
Healthy Weight
      Eating fruits and vegetables helps you have a healthy weight. Fruits and vegetables naturally include less energy than other foods, according to the Center for Disease Control and Prevention. The fiber and water in the fruits and vegetables make you feel that you are full, so you will not feel that you have to eat more food.

20世纪初，南方某学堂的一个学生在作文时将欧洲的卢梭与中国的孔子、孟子相提并论，他的学业成绩因此被评为第一名。据此推测，这一学堂推崇的政治制度是（  ）