下图有关生物变异来源概念图的叙述，不正确的是（） A.产生镰刀形细胞贫血症的直接原因

垄断组织产生的根本原因是

A．第二次工业革命的推动

B．生产和资本的高度集中

C．资本主义列强的侵略扩张

D．资本主义企业相互兼并或联合

It is natural for young people to be critical of their parents at times and to blame them for most of the misunderstandings between them. They have always complained, more or less justly, that their parents are out of touch with modem ways; that they are possessive and dominant; that they do not trust their children to deal with crises; that they talk too much about certain problem—and that they lack sense of humor, at least in parent-child relationships.
I think it is true that parents often underestimate their teenage children and also forget how they themselves felt when young.
Young people often irritate their parents with their choices in clothes and hairstyles, in entertainers and music. This is not their motive. They feel cut off from the adult world into which they have not yet been accepted. So they create a culture and society of their own. Then, if it turns out that their music or entertainers or vocabulary or clothes or hairstyles irritate their parents, this gives them additional enjoyment. They feel they are superior, at least in a small way, and that they are leaders in style and taste.
Sometimes you are resistant and proud because you do not want your parents to approve of what you do. If they approve, it looks as if you are betraying your own age group. But in that case, you are assuming that you are the underdog; you cannot win but at least you keep your honor. This is a passive way of looking at things. It is natural enough after long years of childhood, when you were completely under your parents’ control. But it ignores the fact that you are now beginning to be responsible for yourself.
If you plan to control your life, cooperation can be part of that plan. You can charm others, especially your parents, into doing things the way you want. You can impress others with your sense of responsibility and initiative, so that they will give you the authority to do what you want to do.

The author’s attitude towards children in parent-children misunderstanding is ______.

A. understanding
B. critical

C. praising

D. confused

若要建立一个学生管理系统的输入界面，其中要求选择学生的性别、政治面貌(党/团/群众)及选课情况(共有5门课，可任选)，下列设置方法正确的是( )。

A)将5门课程用一组5个选择框来表示，将性别和政治面貌用5个单选按钮来表示
B)在一个框架上绘制有5个复选框的控件数组表示5门课程，在一个框架上绘制两个单选按钮表示性别，在一个框架上绘制3个单选按钮表示政治面貌的3种情况
C)将5门课程用一组5个单选按钮来表示，将性别和政治面貌用5个选择框来表示
D)用一组10个选择框来表示课程、性别和政治面貌

从重从快的法律依据是( )。

A．宪法

B．刑法

C．刑事诉讼法

D．人民警察法

电力系统专业(一次)承担的主要设计工作范围，以下( )说法比较全面。

A．电力发展规划、电力系统设计、电厂(站)接入系统、变电所接入系统、系统专题研究，以及本体工程设计系统配合等；
B．电力需求规划、目标电网设计、电厂(站)接入系统、变电所接入系统、交直流输电专题研究，以及本体工程设计系统配合等；
C．电源建设规划、无功规划设计、火电厂接入系统、变电所接入系统、联网专题研究，以及本体工程设计系统配合等；
D．能源供需规划、网络方案设计、水电站接入系统、变电所接入系统、输煤输电专题研究，以及本体工程设计系统配合等。