如果一个人的食物有1/2来自绿色植物，1/4来自小型肉食动物，1/4来自羊肉，假如传递效率为10%，那么该人每增加1 kg体重，约消耗植物（　　）

    I learned all about taking responsibility from my mother's tough love. My mom had a wonderful way of helping you1up and realize that your life is going to be what you make it.

    She had this circular way of2you took responsibility for your decisions and the person you would3She would say, “It's your4”5,“What you want and what you get are sometimes two6different things.” And then, “No one ever said life was fair.” And she would7these comments together in such a way that you could never8an argument, and yet, the9was that you realized your life is going to be what you make it.

    So I might go to my mom and say, “I'd like to10football”. And she would say, “Well, it's your life. If you want to go out there and get11and hurt and break your knees and limp around the rest of your life, that's fine.” That is12I would say, “Well, you know, that won't13I'm really fast.” And she would reply, “Well, we don't really have the money.” And then I would14, “Yes but that's not fair.” And she would reply, “Well, life isn't15” Then I would say, “But I've been eager to." And she would reply, “Yes, but what you want and what you get are usually two entirely different things.”

    It was the combination of these16that allowed my mother to lead me down the right path under her17but let me feel as if I was making the decisions18my own. The sum total of that19was, in the end, you're20for the life you lead. That's the best advice I've ever gotten.

   One morning, Wu Liang discovered that her classroom had changed. She found that the desks were no longer in rows, but pushed together to make eight bigger desks. She was too excited about it for the first two days and she couldn't listen to the teachers carefully. But soon she and her classmates got used to this new classroom arrangement (安排). ‘Now our class is quieter,’ said Wu Liang. "What's more, we can come up with our own ideas and learn more through discussion. It's a better way to study."
   Li Yu liked it, too. He said, "Group members first discuss, and then show ourselves in front of the whole class. It makes us believe in ourselves." It was part of a reform (改革) at Li's school. The school made this reform because they wanted to provide students with easier ways to study and more chances to discuss. "Our school hopes it can improve students'abilities (能力) to study by themselves and work in groups," said Zhang Ming, an English teacher.
   However, the reform has demanded (要求) more from teachers. Now they have only 15 minutes to give the lesson which should be taught in 45 minutes before. It is difficult to teach in such a short time. The teachers have to find better ways to teach more effectively."The reform demands more, but I'm sure it is helpful,"added Zhang Ming.