阅读理解
阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。
A
Even with little exposure to cultural standards of beauty, “infants treat attractive faces as distinctive regardless of the sex, age and race of the stimulus(刺激物) faces,” write psychologist Judith H.Langlois and her colleagues in the January DEVELOPMENTAL PSYCHOLOGY.
In their experiment, 60 healthy 6-month-old infants from middle-class families viewed slides showing eight pairs of white male faces and eight pairs of white female faces. Each pair, displayed for 10 seconds, consisted of one attractive and one unattractive face, as previously judged by a group of male and female college students. An experimenter viewed the young participants on a video monitor and recorded the direction and duration of each
