问题 问答题

(二)
某施工单位承担一台大型压缩机和一台配套的燃气轮机的吊装任务,压缩机单重为82t,燃气轮机单重为37.41t,整体到货。在施工现场可提供200t、170t的大型汽车式起重机各一台。200t、170t汽车式起重机吊索具重量均为2t。由于现场条件限制,两台起重机的最佳使用工况见下表。
两台起重机的使用情况

气车式起重机起重机臂长/m作业半径/m额定负荷/t
200t24.4971
170t22.7175.5
注:如果用抬吊时,不均衡荷载系数取1.1。
项目技术负责人组织编制了吊装方案并经项目经理审核、批准。
问题

简述吊装方法的选用原则

答案

参考答案:

解析:吊装方法的选用原则: (1)技术可行。从先进可行、安全可靠、经济适用、因地制宜等方面进行技术可行性论证。 (2)安全。对每一种技术可行的方法从技术上进行安全分析。 (3)保证进度。必须考虑所采用的吊装方法不能影响整个工程的进度。 (4)成本经济。进行吊装方法的最低成本核算。

阅读理解

When I learned that 71-year-old mother was playing Scrabble —a word game, I knew I had to do something. My husband suggests we give her a computer to play against herself. I wasn’t sure whether my mother was ready for it. After all, it had taken 15 years to persuade her to buy an electric cooker. Even so, we packed up our old computer and delivered it to my parents’ home. And so began my mother’s adventure in the world of the computers.

It also marked the beginning of an unusual teaching task for me. I’ve taught people of all ages, but I never thought I would be teaching my mother how to do anything.

She has been the one teaching me all my life: to cook and sew; to enjoy the good times and put up with the bad. Now it was my turn to give something back.

   It wasn’t easy at the beginning. There was so much to explain and to introduce. Slowly but surely, my mother caught on, making notes in a little notebook. After a few months of Scrabble and other games, I decided it was time to introduce her to word processing. This proved to be a bigger challenge to her, so I gave her some homework. I asked her to write me a letter, using different letter types, colors and spaces. 

“Are you this demanding with your kindergarten pupils?” she asked.

“No, of course not,” I said.”They already know how to use a computer.”

 My mother isn’t the only one experiencing a fast personal growth period. Thanks to the computer, my father has finally got over his phone allergy(过敏). For as long as I can remember, any time I called, my mother would answer. Dad and I have had more phone conversations in the last two months than we’ve had in the past 20 years.

小题1:What does the author do?

A.She is a cooker

B.She is a teacher

C.She is a housewife

D.She is a computer engineer小题2:The author decided to give her mother a computer _____.

A.to let her have more chances to write letters

B.to support to her in doing her homework

C.to help her through the bad times

D.to make her life more enjoyable小题3:The author asked her mother to write her a letter _____.

A.because her mother had stopped using the telephone

B.because she wanted to keep in touch with her mother

C.so that her mother could practice what she had learned

D.so that her mother could be free from the housework

单项选择题