说明紧急放风阀在充气位时的作用原理？
参考答案：
当列车充气缓解时，紧急放风阀也处于充气位，制动管来的压力空气首先将紧急勾贝压紧在上盖上，通过勾贝中心杆缩孔Ⅰ，再经过缩孔Ⅱ向紧急室充气，直到紧急室压力与列车管压力相等另一路经阀体暗道进入导向杆下方，将放风阀压紧在阀座上由于制动管压力和弹簧的作用，使紧急勾贝与上盖紧贴，因此充气只能经缩孔行，这就防止因充气时的压力波动而引起误动作
| 阅读下面短文，根据短文内容完成相关任务。 |
| Yesterday morning when I opened my eyes, it was eight already. I got up quickly and ran to the bus stop without having breakfast. As soon as I got on the bus, it started raining. "I'm sure I can get to school on time," I thought. Suddenly, the bus stopped. There was something wrong with the bus. The driver asked us to wait for another one. "I can't wait. The school isn't far. I can run to school," I thought. Then I began to run, but it began to rain hard. I reached the classroom, but my clothes were all wet. The Maths teacher, Mr. Li, was in the classroom. We were afraid of him and I didn't like his Maths lessons. I said, "I'm sorry, Mr. Li. I'm late." "It's you again, Wang Bin. I told you not to be late, but you..." He suddenly stopped and looked at my wet clothes. Then he took off his jacket and gave it to me. "Now, take off your wet coat and put this one on," he said kindly. I went to my seat, wearing Mr. Li's jacket. It was too big but I felt very warm in it. For the first time I found Maths was very interesting. I learned a lot that day. |
| 1. Wang Bin didn't have breakfast because he didn't want to ________ _______ for school. 2. Wang Bin didn't wait for another bus, instead he ________ to school in the ________. 3. Mr. Li did not feel _______ when he saw Wang Bin come into the _______. 4. Mr. Li's jacket didn't _______ Wang Bin, _______ Wang Bin felt warm in it. 5. Wang Bin thought it was _______ of Mr. Li to let him _______ his jacket. |