管道工程供热、供水、通风及照明系统
共20题，每题l.5分。本部分试题由单选和多选组成。错选，本题不得分；少选，所选的每个选项得0.5分。
为了安全供水，我国当前许多城市的建筑小区设贮水池和集中泵房，定时或全日供水，采用的给水方式是( )。
A．单设水箱给水方式
B．设贮水池、水泵的给水方式
C．设水泵、水箱的给水方式
D．竖向分区给水方式

北京某工厂的机电安装工程由该市某机电工程安装公司承担。其中两台起重机分布在两车间，对设备进行吊装就位。项目经理要求设备技术人员制订施工方法和操作工艺，并制订吊装方案，为工艺设备吊装就位创造条件。工程按照吊装方案的步骤顺利地进行，按期完成安装任务。吊装成功的关键在于( )的合理选择。

A.安全措施
B．吊装方法
C．吊装方案
D．吊具

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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 0f touch with modern 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 problems-and that they have no sense of humor, at least in parent-child relationships. I think it is true that parents often underestimate their teenage children and also forget hwo 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 form. the adult world into which they have not yet been accepted. So they created a culture and society of their own. Then, of it turns out that their music or entertainers of 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 to your parents to approve what you do. If they did 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 can't win but at least you can keep you 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 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 is primarily addressing ______.A．parents of teenagersB．newspaper readersC．those who give advice to teenagersD．teenagers 点击查看答案