问题 单项选择题 A1型题

下面的印模材料属于热凝固类印模材料的是()

A.印模膏

B.藻酸盐

C.氧化锌-丁香酚

D.硅橡胶

E.聚醚橡胶

答案

参考答案:A

解析:根据印模材料凝固的形式,分化学凝固类、热凝固类和常温定型类。化学凝固类是指材料在使用中经化学反应后产生凝固。热凝固类印模材料,具有加热软化后自行凝固的特点,印模膏是一种加热软化,冷却变硬的非弹性可逆印模材料。常温定型类是利用材料的可塑性,在常温下稍加压力定型。

阅读理解

Several years ago, I had to replace a receptionist for my unit. Before I advertised for the position, I was approached by another manager, and asked if l would consider a transfer from his staff instead of opening a new competition. My natural question was to ask who he wanted me to consider and why.

It appeared from his description of this employee, Maria, that she was having a lot of problems performing her duties, and had difficulties with her boss, and did not appear to respond to any attempts he, the manager, had made to settle the issues. Now, after listening to his explanation, I really had severe doubts. What crossed my mind, after this discussion, was that he wanted me to take a problem off his hands.

I told him I would think about it and would let him know the next day. As promised, after thinking more about this potential performance issue, I decided that I would agree to speak with Maria privately before I made any decision.

And, what I found out during this interview, left me deep in thought. As it turned out, the    performance issue appeared to result from working for a boss who never extended a good morning greeting, never gave a word of encouragement, and was constantly changing the work load and routines. The end result was a totally ruined employee who was unconfident, hated to see a new work day start.

I decided to accept her transfer to my unit. What started out as a shy, withdrawn and frightened employee turned out to be one of the most productive and loyal employee that I had ever worked with. Maria couldn't do enough and was constantly asking for more and for more responsibility. I was more than happy to give her what she needed-praise for work well done, respect as a person, and encouragement for doing well in anything she dealt with.

Sometimes, we are guilty of holding others back from accomplishing or doing or developing as they should or could. It may be a wise idea that we all look in the mirror, from time to time, to see what we are really like.

小题1:What can we learn about the writer from the first paragraph?

A.He is a manager in the company.

B.He doesn't like his receptionist.

C.He likes to compete with others.

D.He wants to find another position.小题2:After hearing his colleague's description of Maria, the writer thought that Maria_______.

A.attempted to settle the issues

B.was a problem to her boss

C.shouldn't stay in the company

D.could get on well with others小题3:Why did Maria fail to perform well in her previous job?

A.Her previous job was not suitable for her.

B.She had difficulty responding to her manager.

C.Her boss didn't inspire her working enthusiasm.

D.Her boss showed no trust in her ability.小题4:The writer accepted Maria's transfer to unit probably because he thought that________.

A.she was a ruined employee

B.she would need his protection

C.she would turn out to be a good employee

D.she was a shy and frightened employee小题5:The writer probably believes that a good boss should________.

A.praise and award his employees a lot

B.respect, praise and encourage his employees

C.greet his employees and give them much work

D.always give his employees guidance in working

单项选择题 配伍题