问题 单项选择题 A1/A2型题

有关改善牙本质复合层的表面处理技术,不正确的是()

A.可以使用弱酸性水溶液如10-3溶液

B.可以使用氨基酸水溶液

C.可以使用草酸盐水溶液

D.可以使用含Ca2+、Mg2+等离子的钙化液

E.以上都不是

答案

参考答案:A

解析:弱酸性水溶液如10-3溶液、枸橼酸等属于去除复合层的表面处理技术。

阅读理解

WHEN there are some strangers in front of us, which of them will we trust?

According to a new study in the online PloS One (《公共科学图书馆·综合》), people make their decisions to trust others largely based on their faces. Your appearance can do a lot for you, especially if you are in the financial industry. The more trustworthy you look, the more likely people will buy what you’re selling.

Researchers from Britain’s University of Warwick Business School, University College London, and Dartmouth College, US, did a number of experiments.

The research team used computer software to make 40 faces, from the least to the most trustworthy-looking.

The study said that the difference between a trustworthy face and one that isn’t as trustworthy comes from features that look slightly angry or slightly happy, even when the face is at rest. However, a slightly happy face is more likely to be trusted.

Researchers gave participants some money and asked them which face they trusted to invest the money for them. Then researchers gave some good and bad information about the people with these faces, and asked the participants again whom they trusted.

The results showed that even if they got different information, the participants didn’t change their choices. They were still more likely to invest their money with the more trustworthy-looking faces.

Chris Olivola, one of the study’s authors, said in the University of Warwick’s press release: “It seems we are still willing to go with our own instincts (本能) about whether we think someone looks like we can trust them. The temptation (诱惑) to judge strangers by their faces is hard to resist.”

小题1:Which of the following can be a proper title for this passage?

A.What kind of face do you trust?

B.Who did the experiments?

C.Why do you trust him or her?

D.Why did they do the experiments?小题2:According to the study, which of the following faces is most likely to be trusted?

A.A sad face.

B.A smiling face.

C.A crying face.

D.An angry face.小题3:Which of the following about the experiment is TRUE?

A.The trustworthy faces were given good information.

B.Researchers took photos of the 40 people’s faces in college.

C.Most participants gave their money to the trustworthy-looking faces.

D.Participants liked to choose the faces with good information.小题4:What did the researchers learn from their experiment?

A.People can’t refuse temptations.

B.People always do things with their instincts.

C.People often judge strangers by their faces.

D.People don’t trust strangers with sad faces.

单项选择题