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读后续写 I guess everyone would like to set off for a journey with someone we can understand and have fun with. TRAVELLING WITH A COMPANION (同伴) IS GREAT! It's good to have someone with you who can watch your backpack when you want to use the toilet, find the way back home when you get lost, carry some of your luggage (行李) when you're tired, take some photos of you when you want and help you in all kinds of situations. The feeling of having someone by your side makes you feel less stressful about many things. With a companion, you can together share the beautiful moments during th(14分)化学上常用燃烧法确定有机物的组成．下图装置是用燃烧法确定有机物化学式常用的装置，这种方法是在电炉加热时用纯氧氧化管内样品．根据产物的质量确定有机物的组成 回答下列问题： (1)A装置中分液漏斗盛放的物质是______________，写出有关反应的化学方程式______________________________________________________________． (2)C装置(燃烧管)中CuO的作用是______________________________________  (3)写出E装置中所盛放试剂的名称__________，它的作用是______________． (4)若将B装置去掉会对实验造成什么影响？ __________________________. (5)若准确称取1.20 g样品(只含C、H、O三种元素中的两种或三种)．经充分燃烧后，E管质量增加1.76 g，D管质量增加0.72 g，则该有机物的最简式为____．