问题 单项选择题

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

三、阅读理解(共20小题;每小题2分,满分40分)

请阅读下列短文,从每题所给的四个选项(A, B, C和D)中,选出最佳选项,并在答题卡上将该选项的标号涂黑。

When I get off the bus, I’m usually greeted by the sounds of news on CNN. My father welcomes me, and I help him with the usual things—changing the channel and some other tasks. My father has a disease that makes him unable to walk. Despite his disability, my father has always been my role model.

In my first year at middle school, my grades slipped greatly. My father told me I could improve. I currently maintain a B plus average, and he confidently supports me in all my academic efforts. He is against violence to the best of his ability. Love is his most important tool,and he makes sure we know that violence is never the answer.

He urges me not to fear,but to believe in what I think is right.“No matter what anyone tells me,”he says,“I believe what I choose. If someone is discriminating against you for who you are, they don’t deserve your time.”My friends are the most caring people I’ve met, because I realize that they don’t judge me, and they like me as I am.

I’ve always found it strange that people pity me because of my father’s condition. He’s not inferior(次于) to anyone. His disease doesn’t hold him back. He’s normal person.

When I see disabled people out in public, I consider them equal to any other individual. No one is superior to anyone for any physical reason. I’ve known that from that day on, thanks to my dad.

“Anything else?”I’ll ask.

“No, that’s fine.”

As I walk to my room, I think my dad who teaches me the most important things I’ll ever need to know. My father is in no way inferior to anyone else. If anything, he’s even better.

小题1:

According to the passage,we learn that the author’s father is_________.

A.kind but sort of strict

B.disabled but optimistic

C.independent but violent

D.full of love but lacks confidence小题2:

It can be learned from Paragraph 3 that the author’s father gives him some advice on

_________.

A.how to make friends

B.how to help the disabled

C.how to learn from failure

D.how to improve his studies小题3:

.When the author sees disabled people in public,he feels_________.

A.embarrassed

B.sorry

C.natural

D.uncomfortable小题4:

What can we learn from the passage?

A.The author is proud of his father.

B.The author is likely to be taken in by his friends.

C.The author encourages his father to do things himself.

D.The author is looked down upon because of him disabled father.

单项选择题