如图所示是弹簧振子的振动图线，试回答下列问题：
(1)振动的振幅________，周期________，频率________
(2)从零到1.6s时间内，________点的动能最大________点的势能最大。
（1） 2m 0.8s 1.25Hz （2） B D F H A C E G
(1)振动的振幅为2m，周期为0.8s，频率
(2)从零到1.6s时间内，处于平衡位置的质点速度最大，动能最大，即B D F H点的动能最大，在最大位移处速度为零，动能为零，则势能最大，故A C E G点的势能最大
故答案为：1） 2m 0.8s 1.25Hz （2） B D F H A C E G
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| Nowadays, a hospital always manages to keep its beds full. This is good on the one hand, and it's bad on 1 hand. One day, I went to see a sick friend at the hospital. I first went to the 2 desk, where I could get a permit to visit the patient. 3 I could ask which room my friend was in, the lady set down my name, age, filled out a form and 4 a bell. I was just about to tell her what I was coming for when two men arrived with a wheelchair, 5 me in it and pushed me down the hall. "I'm not 6 ," I shouted. "I'm just looking for a friend." "When he comes," one man said, "we'll 7 him up to your room." In a minute I 8 myself in a small room. In no time they undressed me and covered some other things 9 me. One man said "If you need anything, press the button." "I want to get my 10 back." I begged. "Oh, you can 11 us," a voice said, "Even if the 12 happens, we will see that your wife will get everything." They left and locked the door 13 them. I was trying to think of how to escape by the door when Dr. Ward came in with several of his 14 . "Thank God you finally came," I said. "It hurts that badly?" he asked. "No, on the contrary, I am not ill 15 ." Dr. Ward looked 16 . "If you don't feel any pain, that means it's much more 17 than we expected." Then he turned to his students:"This is the most difficult kind of patient to deal with because he refuses to 18 that he is ill. 19 he won't tell us where it hurts, he will never be well again until we find the hurt out for 20 by doing exploratory surgery (手术探查)." | ||||
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