关于飞机发动机推力的问题.
发动机风扇转速恒定的话空气流动量恒定,前后产生压差导致推力,如果飞机速度变大的话前后压差会变小(前提转速不变)那么总推力变小
We can take it to be zero. 可以令它等于零. So,we set this to be zero. 因此,我们令它等于零. We are setting y equals constant. 我们令y等于常数. What if I plug t equals 0 in here? 如果我令t...
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I have a nice school. It is large and beautiful. There are thirty classes in our school. There are many trees around the school. The teachers are friendly to us. My class is on the first floor. There ......
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Mid autumn festival,中秋节 Spring Festival, 春节 Dragon Boat festival, 端午节...
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Part1:英语: 一.按照要求完成句子: 1.我们的朋友遍天下(翻译) Our friends are all around the world ______________________________________ 2.晚会上我通常是喝茶而不是喝咖啡(...
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一定是was,前边是虚拟语气,意思是说:"如果可能的话,我将与他长谈",(事实上,我没有和他长谈)所以,答语应该是:"我当时忙即i was busy then",要使用正常语气,表示过去忙....
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What does she usually do on weekends? She sometimes goes shopping....
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