在未断电的高压电线下或与高压电线距离在危险范围内进行吊装作业会产生什么后果？

若

，A=αβ¹，B是4阶矩阵，r(B) =2，则r(AB-2B)=______．

聚酰胶吸附色谱法的分离原理、规律和应用范围。

经过复议后，谁有可能作为原告提起行政诉讼( )

A．如果维持原决定，申某有权提起行政诉讼

B．如果维持原决定，崔某有权提起行政诉讼

C．如果改变原决定，吴某有权提起行政诉讼

D．如果改变原决定，土地管理员刘某有权提起行政诉讼

I have a friend who lives by a three-word philosophy: Seize the moment. Just possibly, she may be the wisest woman on this planet. Too many people put off something that brings them joy just because they haven't thought about it, don't have it on their schedule, didn't know it was coming or are too strict to depart from their routine.

I can't count the times I called my sister and said,“How about going to lunch in half an hour?” She would gasp and stammer(结结巴巴地说), “I can't. I have clothes on the line. My hair is dirty. I wish I had known yesterday. I had a late breakfast. It looks like rain.”And my personal favorite response:“It's just Monday.”She died a few years ago. We never did have lunch together. From then on, I've tried to be a little more flexible.

Life has a way of going faster as we get older. The days get shorter, and the list of promises made to ourselves gets longer. One morning, we awaken, and all have to show for our lives is repetition of “I'm going to”,“I plan on” and “Someday, when things are settled down a bit.”

When anyone calls my“seize the moment” friend, she is open to adventure and available for trips. She keeps an open mind on new mind on new ideas. Her enthusiasm for life is contagious. You talk with her for five minutes, and you're ready to trade your bad feet for a pair of Rollerblades and skip an elevator for a bungee cord.

My lips have not touched ice cream in 10 years. I love ice cream. The other day, I stopped the car and bought a triple-decker. If my car had hit an iceberg on the way home, I would have died happy.

Now go on and have a nice day. Do something you WANT to, not something on your SHOULD DO list.

小题1:The example of the writer's sister serves as__________.

A．an argument

B．an introduction

C．a support

D．a conclusion小题2:The writer thinks that the underlined excuse “It's just Monday.”is acceptable, because __________.

A．it is still likely that they can have lunch together some time later

B．it sounds most reasonable of all the excuses.

C．it shows respect for the writer's suggestion

D．it indicates the time when they can have lunch together小题3:The underlined word “contagious” in the fourth paragraph means “_________”.

A．appropriate

B．influential

C．practical

D．evident小题4:What is the purpose of the writer by writing this passage?

A．To suggest how time flies.

B．To persuade busy people to relax.

C．To advise people to keep their promise.

D．To convince readers to be flexible on their schedule for practical joy.

概念结构设计阶段得到的结果是

A．数据字典描述的数据需求

B．E-R图表示的概念模型

C．某个DBMS所支持的数据模型

D．包括存储结构和存取方法的物理结构