问题
填空题
在接近收费口的道路上安装了若干条突起于路面且与行驶方向垂直的减速带，减速带间距为10 m，当车辆经过减速带时会产生振动。若某汽车的固有频率为1.25 Hz，则当该车以_________m/s的速度行驶在此减速区时颠簸得最厉害，我们把这种现象称为_________。
答案
12.5，共振
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在接近收费口的道路上安装了若干条突起于路面且与行驶方向垂直的减速带，减速带间距为10 m，当车辆经过减速带时会产生振动。若某汽车的固有频率为1.25 Hz，则当该车以_________m/s的速度行驶在此减速区时颠簸得最厉害，我们把这种现象称为_________。
12.5，共振
| 用方框中所给词的正确形式填空。 | |
to see me because they are sad or nervous. Sometimes 2 helps. Sometimes talking helps. But many doctors 3 that music can help people feel better. I asked a few of my patients how music helps them. "Sometimes I was 4 when I was a child. My family said, 'Play your feelings on the piano!' Sometimes I play a loud 5 on the piano. Soon I feel calm. I can laugh and cry through my 6 on the piano. It's natural for me. It's like breathing (呼吸)." "Listening to music helps me feel 7 . I like to listen to music and dance when I 8 my house." "I play the violin. I like playing at night 9 it is quiet. After playing I am tired and I am happy. I always sleep 10 after playing my violin." Are you a musician? Good! Keep playing. If you are not a musician, listen to music and sing or dance. It's good medicine. |