—No,            .

在复平面上，点$Z_1$对应的复数是$4+i$，线段$Z_1{Z}_2$的中点对应的复数是$1+2i$，则点$Z_2$ 对应的复数是（   ）

“携手抗艾，重在预防”．下列做法正确的是（   ）

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.

阅读文章，回答问题。

    孔乙己喝过半碗酒，涨红的脸色渐渐复了原，旁人使又问道，“孔乙己，你当真认识字么？”孔乙己看着问他的人，显出不屑置辩的神气。他们便接着说道，“你怎的连半个秀才也捞不到呢？”孔乙己立刻显出颓唐不安模样，脸上笼上了一层灰色，嘴里说些话；这回可是全是之乎者也之类，一些不懂了。在这时候，众人也都哄笑起来：店内外充满了快活的空气。

上段文字表现了孔乙己怎样的心理变化过程？