问题
问答题
音鼓上的飞轮有什么作用？
答案
参考答案：
利用飞轮的转动惯量来抵制影片与音鼓相对运动，达到影片速度稳定。飞轮可以储存能量，也可以释放能量来保证音鼓轮的圆周速度均匀。
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音鼓上的飞轮有什么作用？
参考答案：
利用飞轮的转动惯量来抵制影片与音鼓相对运动，达到影片速度稳定。飞轮可以储存能量，也可以释放能量来保证音鼓轮的圆周速度均匀。
阅读下面短文,根据短文内容完成表格中所缺信息,每空一词。 (共10小题,每小题1分,计10分) We want some help Sandy: Please help me. I am a girl from America. I can’t learn Chinese well. My Chinese teacher always speaks too fast. Many of my friends think Chinese is easy. But I don’t ! I can’t get high marks(高分). Sometimes, I can’t understand what the teacher says in class. How I hope I can have a Chinese pen friend. Jim: I am too short. I am only 1.4 meters tall. I like playing basketball, but they all say I can’t be a good basketball player. How can I be as tall as all my friends? Can short boys play basketball ? I hope someone can teach me how to be a good guide(后卫). Joan:I want to be a slim girl. Some of my friends say I am too fat. Is it because my parents are fat, too ? Am I a pretty girl? When I see those slim girls, my eyes are green. I hope to know some ways to be slimmer . Danny: I need friends. I am sad because I don’t have many good friends to chat with. I am not good at talking. And my face turns red when I am with many people. But I really want to have many friends. Can you tell me how to make friends with other children? Children 小题1: help
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