题目

阅读理解 Itis Oct. 24. You pick up a bottle of milk. You see Best Before Oct.23on it. What do you do with it? Most people just throw it away. It's a bigwaste. TheUnited Nations says that over one third of food goes to the trash. But 795million people on Earth don't have enough to eat. To change this, people havecome up with great ideas. After all, the best place for food is our stomachs,not the trash. Sharingfood Peoplesay, There's no such thing as a free, lunch. But they are wrong.Recently, share fridges have come to cities like Shanghai andQuanzhou, Quick meals, milk, cookies and cakes a15．下列的相关推理：①同种分子构成的物质，性质完全相同  ②含一种元素的物质，一定是单质  ③同种元素的原子，质子数一定相同  ④粒子得到电子，一定度为成阴离子；其中不正确的是（　　）A．①③B．②④C．①②④D．①③④