服务项目采购中选择服务方时主要的考虑因素是( )。 A．费用 B．时间 C．报价

锅炉的工作特性有( )。

A．易于损坏性

B．爆炸的危害性

C．使用的广泛性

D．间断运行性

E．连续运行性

（一） 背景资料某电力建设工程超大和超重设备多，制造分布地域广，运输环节多，建设场地小，安装均衡协调难度 大，业主将该工程的设备管理工作通过招投标方式分包给一专业设备管理公司（以下简称设备公司），设备 安装由一家安装公司承担。该工程变压器（运输尺寸11.1×4. 14×4.9m）在西部地区采购，需经长江水道运抵东部某市后，再经 由50km 国道（含多座桥梁）方可运至施工现场。对此，设备公司做了两项工作，首先经与设备制造商、沿 途各单位联系妥当后，根据行驶线路中的桥梁状况等因素，进行检测、计算和采取了相关措施；其次变压 器采用充气方式运输。在主变压器运输过程中，安装公司经二次搬运、吊装、就位、吊芯检查、干燥等工作后，对其绕组连 同套管一起的直流电阻测量、极性和组别测量等进行了多项试验，并顺利完成安装任务。问题

主变压器安装中需要哪些特种作业人员？（4 分）

9月龄的婴儿体重按公式粗略估计应为()

A．5kg

B．6.5kg

C．7.5kg

D．8kg

E．9kg

I worked as a waitress for a few months. I was not a great waitress and I worked in a restaurant that served mostly older people who, however, have not learned that ten percent of their expense is no longer a tip that waitresses can live on – let alone a college student working hard for 20 hours a week!

One night, when I was still working two hours after shift(轮班) was supposed to finish, all that I wanted was for my last table to clear out so I could clean and go home. My last customer caught me on her way out and asked if I had change for a twenty. I dug through my pocket and turned out my night’s earnings—a small amount of $14.

She smiled at me and said, “That is enough.”

My eyes were full of tears as I made the uneven(不等价的) exchange. “Thank you, ”I said in a low voice.

I heard her little boy ask why she did that and she explained that I’d had a hard night and she just wanted to help me out. I even heard her words, “Reach out your hands when somebody needs help.” I noticed the little boy nodded his head. Not only did her kindness touch my hurried and tiring life, but she also taught her son an important lesson that night.

I do not know her name, but I will always remember her.

1. According to the passage, at that time the author was ___________.

A. a full-time worker               B. still a college student

C. a school-leaver                 D. a secretary in a big company

2. Why did the woman want an uneven exchange?

A. She was to thank the author for her service.

B. She was in great need of change to buy a gift for her son

C. She was only to teacher her son a lesson.

D. She only wanted to give a hand to the author.

3. What was the woman’s son’s attitude to what she did at last?

A. Unbelievable.                  B. Acceptable.

C. Disappointed.                  D. Amazed.

4. What did the woman probably teach her son?

A. To live a hard life.

B. To give a waitress a more than 10% tip.

C. To show kindness to those  who need help.

D. To make an uneven change.

简述张力性气胸的临床表现和处理要点。