题目

No fight can end, and no friendship can move on, until everyone says these little words: I’m sorry. Sometimes, though, they can be difficult to say,  76  .   It’s not about winning.     Friendships are not like the Super Bowl, and there should never be a winner and a loser. When you start fighting with a friend, it may feel important that you “win” the fight by proving you’re right and he is wrong, or by making him be the first to apologize.      77      You may have heard the expression “His pride stood in the way.” It is usually used to describe a perso某化学课外小组用如图装置制取溴苯并证明苯和液溴发生的是取代反应。先向分液漏斗中加入苯和液溴，再将混合液慢慢滴入反应器A(A下端活塞关闭）中。(1）写出 A 中发生反应的化学方程式_____________。(2）实验结束时，打开A下端的活塞，让反应液流入B中，充分振荡，目的是__________，写出有关反应的离子方程式____________。(3）C中盛放 CCl4的作用是___________________。(4）为证明苯和液溴发生的是取代反应，而不是加成反应，可向试管D中加入AgNO3溶液， 若产生淡黄色沉淀，则能证明。另一种验证的方法是向试管D中加入___________，现象是_____________。