| 2005年是“世界物理年”，100年前的1905年是爱因斯坦的“奇迹”之年，这一年他先后发表了三篇具有划时代意义的论文，其中关于光量子的理论成功地解释了光电效应现象．关于光电效应，下列说法正确的是（ ） A．当入射光的频率低于极限频率时，不能发生光电效应 B．光电子的最大初动能与入射光的频率成正比 C．光电子的最大初动能与入射光的强度成正比 D．某单色光照射一金属时不能发生光电效应，改用波长较短的光照射该金属可能发生光电效应 |
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| In the depths of my memory , many things I did with my father still live. These things have come to represent,in fact, what I call 1 and love. I don't remember my father ever getting into a swimming pool. But he did 2 the water. Any kind of 3 ride seemed to give him pleasure. 4 he loved to fish; sometimes he took me along. But I never really liked being on the water, the way my father did. I liked being 5 the water, moving through it, 6 it all around me. I was not a strong 7 , or one who learned to swim early, for I had my 8 . But I loved being in the swimming pool close to my father's office and 9 those summer days with my father,who 10 come by on a break. I needed him to see what I could do. My father would stand there in his suit,the 11 person not in swimsuit. After swimming,l would go 12 his office and sit on the wooden chair in front of his big desk, where he let me 13 anything I found in his top desk drawer. Sometimes, if I was left alone at his desk 14 he worked in the lab, an assistant or a student might come in and tell me perhaps I shouldn't be playing with his 15 . But my father always 16 and said easily,"Oh, no,it's 17 . " Sometimes he handed me coins and told me to get 18 an ice cream… | ||||
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