你微笑的口型做对了吗？

                                                                                                   

Julia Roberts is famous for the dazzling Hollywood smile which has made her queen of the rom-com. But while Julia Roberts’ toothy smile works for her, it is not advised for everyone. A study has found that people with less lengthy grins(露齿笑), which do not turn up at the corners, are best advised to hide their teeth when smiling. People who smile less broadly risk appearing “contemptuous” if they show their teeth, US researchers found.
Instead, if your grin is smaller, a tight-lipped smile may make you look more genuine and friendly. The findings come from researchers at the University of Minnesota, who quizzed 802 people on their reactions to smiles.
Lead author Dr Nathaniel Helwig said, “The results reveal that no single smile is ‘perfect’ compared to the others. Instead, there exists a ‘smile sweet spot’, which creates successful smiles. Individuals with larger smiles should show larger amounts of teeth, and individuals with limited mouth movement should be encouraged to form closed-mouth smiles.”
It takes only a tenth of a second for a stranger to read your smile, forming a quick judgement on your motives and trustworthiness. The researchers presented participants with people smiling, which they rated from “fake” to genuine and from creepy to pleasant. But, to the authors’ surprise, no one smile was judged to be the most genuine. It requires the right amount of teeth to match someone’s smile length and angle.
A Julia Roberts-style smile was judged as successful in people with larger smiles and a greater angle between their bottom lip and the top of their smile at the far corner. The researchers found a narrow open-mouthed smile which did not turn up at the corners was misunderstood as a sign of “contempt” or “fear” when rated for emotion.

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1.What makes Julia Roberts have a charming smile?

A The queen of the rom-com.

B The lengthy grins.

C The beautiful Hollywood star.

D The special teeth.

解析：选B。推理判断题。根据文章第一段第三句A study has found that people with less lengthy grins(露齿笑), which do not turn up at the corners, are best advised to hide their teeth when smiling. 可以得知，如果不能做到像茱莉亚·罗伯茨那样长长地露齿而笑，作者建议就闭嘴微笑，据此可以推知是茱莉亚·罗伯茨的lengthy grins让她的微笑很迷人。故选B。

2.Which of the following is suitable for a “smile sweet spot”?

A If you have large smiles, you should show little of your teeth.

B If you give smile less, you’d better keep all your mouth closed.

C The more you have laughs, the happier you will surely become.

D None of people are able to find the no single smile is “perfect”.

解析：选B。推理判断题。根据第三段最后一句的Individuals with larger smiles should show larger amounts of teeth, and individuals with limited mouth movement should be encouraged to form closed-mouth smiles.可以得知，如果笑的时候嘴的动作不大，那最好就做一个闭嘴的微笑。故选B。

3.What does the underlined word “creepy” in the fourth paragraph mean?

A Real.

B Expensive.

C Attractive.

D Disgusting.

解析：选D。词义猜测题。根据第四段第二句中的from “fake”（作假） to genuine（真诚）可知creepy与 pleasant也是一对意思相反的词，即是从“令人厌恶”到“愉悦”，故可推测出creepy意为disgusting。故选D。

4.Where does the article appear?

A The advertisement.

B The science magazine.

C The travel guide.

D The music magazine.

解析：选B。推理判断题。根据第一段的A study has found that ...以及本文主要讲述的是什么样的微笑是最成功的，即是对微笑的科学研究，所以该篇文章可能出现在科技杂志中。故选B。