题目

One day，a farmer was walking along a road with his son Thomas．The father said。“Look! There’s a horseshoe  1   the ground．Pick it up and put it in your bag．”Thomas said．“It wastes my time．”His father said  2  but he picked it up himself．When they got to a nearby town，they had a rest．There the farmer  3   the horseshoe and with the money he bought some strawberries．     The father and the son went on walking．The sun was well up in the  4  ．They soon drank up their water．and there wasn’t a house or even a tree for them to  5  ．Thomas felt t已知硫化氢气体可与溴水反应生成硫，下图是用来制取硫化氢并比较硫元素、溴元素非金属性强弱的实验装置。 （1）将下列操作步骤补充完整： ①______________________________________________； ②用大火加热使硫沸腾与H2化合； ③______________________________________________； ④停止加热并做善后处理。 （2）装置（Ⅰ)中制氢气不直接用稀硫酸与锌反应，而将浓H2SO4滴入水中，其优点是__________________________________。 （3）装置（Ⅲ)中发生的现象是_______________________________，由此得出的结论是_____________________，反应的离子方程式为____________________________________。