在一个propane burner上放两个rigid plastic tubes,一个直径大一个直径小,先把小的缓缓的放在火焰上,会听见爆炸声,为什么.接着把大的套在小的外面,移动大的时会有声音,为什么 实验2在一个吸管上

在一个propane burner上放两个rigid plastic tubes,一个直径大一个直径小,先把小的缓缓的放在火焰上,会听见爆炸声,为什么.接着把大的套在小的外面,移动大的时会有声音,为什么 实验2在一个吸管上 家庭教师27的X BURNER AIR 和X BURNER 有什么差别不要说多了一个AIR X BURNER burner blocks中文翻译 Burner is not 关于Mg在Bunsen burner火中的反应如果把一小条Mg放在Bunsen　burner火焰中,Mg会产生耀眼的白色光芒.Mg是和什么物质产生反应的?是Bunsen　burner里碳氢化合物（CH4）和氧产生的二氧化碳(CO2)还是氧气(O 英语翻译请帮我翻译一下an electric arc between electrode bottom and burner body allow burner ignition during burner X BURNER AIR的中文意思 put on the back burner是什么意思 英语翻译Don’t Skimp on This Calorie-Free Calorie Burner. smoke height 原文：The oxygen index for the propane results was taken as 0.25 because propane does not have a smoke height in air. 英语中两个名词连用是什么结构,合理吗例如 Design specification are 1% isobutane impurity in the distillate and 0,5% propane impurity in the bottom.其中 Design specification 和 isobutane impurity 还有 propane impurity 都是两 A system of propane and n-butane exists in two-phase vapor/liquid equilibrium at 10.0bar and 323 K.The mole fraction of propane is about 0.67 in the vapor phase and about0.40 in the liquid phase.Additional pure propane is added to the system,which is 3.The Bunsen Burner is so named because it is thought ___________ by Robert Bunsen. fill up your burner with water and add only few drops of oil 求翻译 USE DIL UTED FOR MASSAGE,COMPRESS,INHALATION,BATH OR BURNER的汉语意思 suspended heating system with hot air generator 70000k/cal/h gasoil burner ,s/s chimney 英语翻译Dual Venturi Housing AsyOpen Top Grate- GarlandOpen Top Grate- USROpen Top Grate- SunfireBurner Head- GarlandOpen Burner Head- USRBurner Head- SunfireGarland Top GrateNew Sunfire Burner Head翻译软翻译不出来的，他有特殊的意