题目内容
In the early 1900s, Ivan Pavlov, a famous Russian physiologist who did Nobel prize-winning research on digestion, conducted a marvelous experiment that demonstrated what has come to be called () .
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() is a form of learning in which voluntary responses come to be controlled by their consequences.
() refers to the initial, momentary recording of information in our sensory systems.
() are assumed to be represented in our minds in some nonlinguistic form.
一个物体从空间一点运动到另外一点。在它到达目的地之后，它的位移（）它经过的路程。
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