题目

某小组探究“凸透镜成像规律”的实验装置如图所示：          （1）如图所示，让太阳光正对着凸透镜照射，把光屏置于另一侧。改变光屏与凸透镜间的距离。直到光屏上出现一个最小最亮的光斑，测得凸透镜的焦距是_______cm。 （2）将蜡烛、凸透镜、光屏依次放在光具座上。点燃蜡烛后，调整烛焰、凸透镜、光屏的中心大致在________上。 （3）实验中，燃烧的蜡烛逐渐变短，光屏上的像逐渐向_______(上/下）移动。为了使像成在光屏的中心，应将 I am a good mother to three children. I have tried never to let my profession 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, 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, and 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 with joy and passion（激情）as it ought to be lived. 64  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. 65  How did the author form her view of life?        A．Through social experience.             B．By learning from her friends.        C．Through an unfortunate experience.    D．From her children and husband. 66  By the underlined sentence “It is so easy to exist instead of to live” in the fifth paragraph, the author really means _______.        A．make a living rather than live a real life.              B．work rather than enjoy life        C．waste a lot in life                                 D．forget the most important lessons in life 67  What’s the author’s attitude toward work?        A．Do it well to serve others              B．To earn enough money to make life better.        C．Try your best to get higher position and pay.        D．Don’t let it affect your real life. 68  It can be inferred from the passage that _______.        A．the author is a success in personal life.          B．the author doesn’t try her best to work well        C．the author spends all her time caring for her children        D．the author likes traveling very much