The baby is just one day old and has not yet left hospital. She is quiet but alert (警覺). 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(凝視) 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(同樣地) when the researchers started with drumbeats and moved to spots.
【小題1】The experiment described in Paragraph 1 is related to the baby’s ______.

A．sense of hearing.
B．sense of sight.
C．sense of touch.
D．sense of smell.
【小題2】Babies are sensitive to the change in ______.
A．the size of cards.
B．the colour of pictures.
C．the shape of patterns.
D．the number of objects.
【小題3】Why did the researchers test the babies with drumbeats?
A．To reduce the difficulty of the experiment.
B．To see how babies recognize sounds.
C．To carry their experiment further.
D．To keep the babies’ interest.
【小題4】Where does this text probably come from?
A．Science fiction.
B．Children’s literature.
C．An advertisement.
D．A science report.


【小題1】B
【小題2】D
【小題3】C
【小題4】D

解析【文章大意】本篇是一篇說明文。文章對剛出生一天的嬰兒做實驗，通過變化紙上的黑點及鼓的敲打次數(shù)對嬰兒的視覺、聽覺進(jìn)行的一個實驗。
【小題1】根據(jù)文章第一段文中的She stares it carefully. Her gaze starts to lose its focus.可知，本段是對孩子的視覺實驗。故選B。
【小題2】根據(jù)文章第二段中的Babies pay more attention to squares moving randomly on a screen when their number changed from two to three, or three to two.可知D正確。
【小題3】根據(jù)文章第一段得知對孩子的視力進(jìn)行試驗，接下來用鼓來對孩子的聽力繼續(xù)試驗。所以選C。
【小題4】縱觀文章，這是一篇醫(yī)學(xué)試驗報告，所以選D。

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