问题
填空题
一对直齿圆柱齿轮要实现正确啮合，其（）和（）必须分别相等。
答案
参考答案：模数；压力角
搜题请搜索小程序“爱下问搜题”
一对直齿圆柱齿轮要实现正确啮合，其（）和（）必须分别相等。
参考答案：模数；压力角
| 完形填空 | ||||
| Miss Zhao is one of the most popular teachers in the school. Yesterday she came into the 1 with a big smile on her face. She asid to her 2 that she was 3 to see they did well in the sports meeting. But 4 was not pleased to see the classroom last Saturday not as 5 as usual. She hoped they would chean the classroom every day.Wei Hua was on 6 yesterday. She said everyone was at 7 except Lin Tao. Then she told Miss Zhao about their 8 to the Great Wall last Sunday. Luckily the weather was 9 . The played games and had a picnic there. After Wei Hua 10 her talk, Miss Zhao began her lesson. | ||||
|