题目

(多选)下列关于ATP和蛋白质的叙述，正确的是（    ） A．ATP中的“A”与构成DNA,RNA 中的碱基“A”是同一种物质 B．ATP 中的能量可来源于光能和化学能，也可以转化为光能和化学能 C．分离和纯化蛋白质可根据其分子大小，所带电荷的性质等差异进行 D．蛋白质的功能特性是由其组成的氨基酸种类，数量和空间结构决定       I am a good mother to three children. I have tried never to let my work stand in the way of being a good parent. I no longer consider myself the center of the universe. I show up. I listen. I try to laugh. I am a good friend to my husband. I have tried to make marriage vows（誓约）mean what they say. I am a good friend to my friends, and they to me. Without them, there would be nothing to say to you today. So here’s what I wanted to tell you today: Get a life. A real life, not a desire of the next promotion（提升）, the bigger paycheck, the larger house. Get a life in which you are not alone. Find people you love, and who love you. And remember that love is not leisure（空闲）, it is work. Pick up the phone. Send an e-mail. Write a letter. And realize that life is the best thing and that you have no business taking it for granted. It is so easy to waste our lives, our days, our hours, our minutes. It is so easy to exist instead of to live. I learned to live many years ago. Something really, really bad happened to me, something that changed my life in ways that, if I had my choice, it would never have been changed at all. And what I learned from it is what, today, seems to be the hardest lesson of all. I learned to love the journey, not the destination. I learned to look at all the good in the world and try to give some of it back because I believed in it, completely and totally. And I tried to do that, in part, by telling others what I had learned. By telling them this: Read in the backyard with the sun on your face. Learn to be happy. And think of life as a deadly illness, because if you do, you will live it with joy and passion as it ought to be lived. 71. The best title of this passage probably is _______.    A. Love your friends                 B. Live a real life    C. Don’t waste time                     D. Be a good mother and wife 72. How did the author form her view of life?    A. By working and social experience.     B. Learning from her friends.    C. Through an unfortunate experience.   D. Because of her children and husband. 73. The underlined sentence “It is so easy to exist instead of to live” in the fifth paragraph probably has the same meaning as ______.    A. it is so easy to keep alive but not to live a real life.    B. it is very hard to live a real life       C. it is so easy to make a living    D. it is more difficult to exist than to live a happy life. 74. What’s the author’s attitude towards work?    A. Do it well to serve others.      B. To earn enough money to make life better.    C. Try our best to get higher position and pay.    D. Don’t let it affect your real life. 75. It can be inferred from the passage that _______.    A. the author is a success in personal life.    B. the author didn’t try her best to work well.    C. the author spent all her time caring for her children.    D. the author likes traveling very much.