题目

仔细阅读下面五个句子，然后用下面方框中所给的单词或短语填空，使每个句子在结构、句意和逻辑上正确。（提示：选项中有一个是多余的。） push / mean / certain / fought on / manage / fought againstpush / mean / certain / fought on / manage / fought against 【1】He is ________ and only thinks about himself. He doesn't treat others nicely.【2】When they started working, they can _________ their own lives.【3】Many times I thought about giving up but I __________.【4】The large stones were put together in a __________ way.【5】Peopl（1）写出实验室由苯和浓硝酸反应制取硝基苯的化学方程式：    ．该反应属于    反应．（2）图所示的实验装置图中存在哪些错误？请指正．①    ；②    ；③    ．（3）在试管中将两种浓酸混和的操作方法是    （4）试简述水浴加热的优点    ．