下列哪一种因素可造成铸件浇铸不全()。 A.铸型焙烧时间过长 B.安插的铸道粗了 C

题型:单项选择题 A1/A2型题

问题:

下列哪一种因素可造成铸件浇铸不全()。

A.铸型焙烧时间过长

B.安插的铸道粗了

C.支架的蜡型过厚

D.铸造机离心力不足

E.铸造时间过长

考点:口腔医学(医学高级)口腔修复学口腔修复学题库
题型:单项选择题 A1/A2型题

阅读理解。

     A research shows that expressions on our faces have a strong relationship with our genes (基因).

According to the study, facial expressions of our feelings are innate and are not achieved in cultural

learning.

     This is the first research to show that blind people have the same facial expressions as the sighted

when showing certain feelings-the same facial muscles (肌肉) start working. What's more, the research

gives the new method of how people control their feelings in certain social situations. It states that people

do not leam to manage their facial expressions by examining the expressions of others.

     In his study, David Matsumoto, San Francisco State University Psychology Professor, examined

facial expressions of bhnd and sighted judo athletes (柔员) that took part in the Summer Olympics and

Paralympics (残奥会). He examined over 4 800 pictures of different athletes who came from 23 countries.

Matsumoto found that both blind and sighted sportsmen had the same facial expressions, according to a

specific social situation.

     "This suggests genes decide facial expressions of feelings," he said.

     One of his findings was the "social smiles" of judo athletes who lost their match and got the second

place. It is interesting to find that only mouth muscles are used in social smiles, while during real smiles,

shown when a person is really happy, the eyes of a person twinkle and get smaller and the cheeks (脸颊)

rise.

     "Losers pu8hed their lower lip up as if to control the feeling on their face and many produced social

smiles," said Matsumoto. "People blind from birth were unable to leam to manage their feelings with the

help of examining others' facial expressions." He thought that there must be another system involved.

     "It's possible that in order to hide sad feelings, humans have developed a system that closes the mouth

so that they are stopped from crying, biting or rudeness," he said.

1. The underlined word "innate" in the first paragraph means _____.

A. from birth

B. from daily life

C. from others

D. from teaching

2. According to the passage, real smiles are different from social smiles in _____.

A. opening the eyes

B. using facial muscles

C. closing the mouth

D. watching others' expressions

3. How does the writer make us believe the new findings?

A. By telling us an interesting story.

B. By interviewing some researchers.

C. By showing the results of the research.

D. By giving the answers to the questions.

4. Which can be the best title for the passage?

A. Smiles and Olympics

B. Blind and Sighted Athletes

C. Social Smiles and Real Smiles

D. Genes and Facial Expressions

题型:单项选择题 A1/A2型题

如果经纪人与交易其中一方为代理关系,在交易洽谈中,应站在()立场上洽谈价格。

A.中间

B.委托方

C.对方

D.视具体情况而定

题型:单项选择题 A1/A2型题

下列物质中属于有机化合物的是(  )

A.CO2

B.HCl

C.CH3COOH

D.CaCO3

题型:单项选择题 A1/A2型题

塑性腻子的凝固过程是()。

A.物理变化

B.化学变化

C.物质挥发

题型:单项选择题 A1/A2型题

男员工西裤裤脚长度以穿鞋后距地面()cm为宜

A.1

B.2

C.3

D.0.5

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