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  3. The baby is just one day old and has not yet left hospital. She is quiet but alert (警觉). Twenty centimeters from her face resear

The baby is just one day old and has not yet left hospital. She is quiet but alert (警觉). Twenty centimeters from her face resear

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问题    The baby is just one day old and has not yet left hospital. She is quiet but alert (警觉). Twenty centimeters from her face researchers have placed a white card with two black spots on it. She stares at it carefully. A researcher removes the card and replaces it by another, this time with the spots differently spaced. As the cards change from one to the other, her gaze(凝视) starts to lose its focus— until a third, with three black spots, is presented. Her gaze returns: she looks at it for twice as long as she did at the previous card. Can she tell that the number two is different from three, just 24 hours after coming into the world?
   Or do newborns simply prefer more to fewer? The same experiment, but with three spots shown before two, shows the same return of interest when the number of spots changes. Perhaps it is just the newness? When slightly older babies were shown cards with pictures of objects (a comb, a key, an orange and so on) , changing the number of objects had an effect separate from changing the objects themselves. Could it be the pattern that two things make, as opposed to three? No again. Babies paid more attention to squares moving randomly on a screen when their number changed from two to three, or three to two. The effect even crosses between senses. Babies who were repeatedly shown two spots became more excited when they then heard three drumbeats than when they heard just two: likewise (同样地) when the researchers started with drumbeats and moved to spots.
Babies are sensitive to the change in______.
选项 A、the size of cards
B、the colour of pictures
C、the shape of patterns
D、the number of objects
答案D
解析 推理判断题。选项A和B在文中根本没有提及，排除之；选项C的patterns在第二段的第5行倒是有所体现，只不过the shape of patterns又是出题者利用文中信息捏造出来的干扰项罢了，并非题干所问，排除之；选项D在文中第二段的第4行“changing the number of objects had an effect”有明确的出处，故选D。
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