阅读下面短文，掌握大意，然后从21-40各题所给的四个选项（A、B、C和D）中，选出最佳答案。

        My parents got divorced when I was one year old. I've heard from family that it was because my father was 1， but I was too little to remember and he was never violent  2I was growing up. My father is an alcoholic. He was 3once when I was a teenager for three years then had another divorce. I'm his4child. My mother has been married and divorced three times, and all of her 5were abusive. I'm the oldest of five half­ siblings. My first step­father was  6violent with my mother regularly, they were married when I was 2 and 7when I was 8. My second step­father never fought with my mother，8was verbally (言语)abusive with my two oldest younger brothers and myself and also  9me when I was 17. They were married when I was 11 and 10divorce proceedings last year when I was 22. The divorce was just finalized last month. I'm sure I don't have to 11detail about the emotional influences of growing up in this12. I do find that it has made it difficult for me to 13the pattern for my own life. I find myself using escapism(逃避现实) when 14gets too hard, just like my mother did. I find myself latching(锁定) on to 15men with a co­dependent loyal. My father's drug and alcohol use has also  16my decisions. All of the people I have been in a  17relationship with have a drug addiction of some sort. I've never been 18to drugs, though. Only people. In spite of all of this, I am committed to 19these generational problems that have been a part of my family history 20since my great­ grandparents.

已知点A（a，5）与点A′（﹣2，b）关于经过点（3，0）且平行于y轴的直线对称，那么a+b=____ ．

认识反应规律，控制反应条件，让化学反应为人类服务．

（1）化学小组的同学利用图12所示的装置探究燃烧的条件．

①通过对比铜片上红磷和白磷的不同现象，得出的结论是____ ．

②小明同学对以上实验进行概括，得出的下列说法中，不正确的是____ （填字母序号）．

A．此组实验烧杯中的热水只起提高温度的作用   B．图1中水下白磷未燃烧是由于没有与氧气接触

C．对图1实验应该进行三组对比分析   D．若将图2中白磷换成红磷，不能观察到燃烧现象

（2）A常用于切割金属．在点燃条件下，A和B反应能生成C和D．反应前后分子变化的微观示意图如图3所示．

①下列说法正确的是____ （填字母序号）．

A．该反应属于放热反应    B．A物质具有可燃性

C．化学反应前后原子的种类不变    D．该反应属于置换反应

②该反应中A与B的质量比是　____ ．

③该反应过程中，若提高B物质的浓度及用量，好处是____ ．

党的十八届四中全会通过的《中共中央关于全面推进依法治国若干重大问题的决定》。《决定》提出立法机关要“拓宽公民有序参与立法途径，健全法律法规规章草案公开征求意见和公众意见采纳情况反馈机制，广泛凝聚社会共识”。健全立法机关和社会公众沟通机制的作用在于（   ）。

①明确立法权力边界，防止部门利益法律化

②完善立法机制，保障公民政治权利的实现

③使法律更好地体现民意，提高法律权威

④促进公民提高法律意识，自觉遵法守法