问题
问答题 简答题
简述氧气呼吸器第二次工作循环原理？
答案
参考答案：呼吸舱通过压缩弹簧给膜片加载，保持舱内压力比外界环境气压稍高的正压。呼吸气体驱动膜片往复运动，改变呼吸舱容积，若舱容减少，舱内气压降低，自动补给阀开启补充氧气，若舱容增大，舱内气压升高，排气阀自动开启，向外排出多余气体。
搜题请搜索小程序“爱下问搜题”
简述氧气呼吸器第二次工作循环原理？
参考答案：呼吸舱通过压缩弹簧给膜片加载，保持舱内压力比外界环境气压稍高的正压。呼吸气体驱动膜片往复运动，改变呼吸舱容积，若舱容减少，舱内气压降低，自动补给阀开启补充氧气，若舱容增大，舱内气压升高，排气阀自动开启，向外排出多余气体。
| 完形填空。 | ||||
| Please help! Ladies and gentlemen, thank you very much for coming to this concert. I hope you have enjoyed the music. The purpose of this concert is to 1 money for children in Africa. Every day 2 children in Africa die because they have diseases or have not enough 3 . There are two main reasons. First, there are no jobs for the children's parents, so they have no money to buy food or 4 . Second, the governments in many African countries do not have the money to take care of poor people. Most African countries are poor. The land is not good for 5 food and the weather is also bad for farming. The organization we are trying to help, the Feed Africa Fund, 6 a lot of money every year on food for poor people in Africa. The money comes 7 people like you kind, generous people who do not want to see children die form hunger. Just one dollar can buy enough rice or corn to 8 a family of four for three days. How much do you spend on food every day? Ten dollars? Twenty dollars? I am sure you can spend a little 9 on your own food so that you have a few dollars for The Feed Africa Fund. Ladies and gentlemen, we will now take a 10 . Please be generous. Thank you. | ||||
|