题目

小明是自行车骑行爱好者，他感到雨天或晚上外出骑行不方便，于是想设计一个装置，可以把自行车支撑起来作为室内健身器使用。如图所示是他的自行车。请你帮助小明设计该装置，设计要求如下： ①能稳定支撑自行车，后轮转动时自行车在原地保持不动； ②后轮转动时最好有一定的阻力，以提高锻炼效果； ③结构牢固可靠； ④材料自选。 请根据描述和设计要求完成以下任务： （1） 如图所示的自行车设计尺寸中，主要从人机关系人体Chinese proverbs are rich and they are still widely used in Chinese people’s daily life. 1. these proverbs there are often interesting stories. For example, the proverb, “plucking up a crop 2. (help) it grow”, is based on the following story.It is said that a short—tempered man in the Song Dynasty (960—1279) was very anxious to help 3. rice crop grow up quickly. He was thinking about 4. day and night. But the crop was growing much slower than he expected. One day, he came up with an idea 5. he would pluck up all of his crop a few inches. He did so the next day. He was very tired 6. doing this for a whole day, 7. he felt very happy since the crop did “grow” 8. (high). His son heard about this and went to see the crop. Unfortunately the leaves of the crop began to wither.This proverb is saying we have to let things go in their 9. (nature) course. Being too anxious to help an event develop often 10. (result) in the contrary to our intention.