3.with no reward except 双重否定,所以是肯定结构
4.本段阐述新观点
Papousek began his studies by using milk in the normal way to reward the babies and so teach them to carry out some simple movements, such as turning the head to one side or the other. Then he noticed that a baby who had had enough to drink would refuse the milk but would still go on making the learned response with clear signs of pleasure. So he began to study the childrens responses in situations where no milk was provided. He quickly found that children as young as four months would learn to turn their heads to right or left if the movement switched on a display of lights - and indeed that they were capable of learning quite complex turns to bring about this result, for instance, two left or two right, or even to make as many as three turns to one side.
注: 1.study:开始做实验,抓住代表人物、实验目的、实验结果
2.第一句过程,第二句 notice 表示结果
3.found 表示实验结果
27. Papousek noticed in his studies that a baby ________.
A) would make learned responses when it saw the milk
B) would carry out learned movements when it had enough to drink
C) would continue the simple movements without being given milk
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