单项选择题

In the following paragraphs the author will most probably go on to discuss ______.

A．definitions of positive feelings and negative feelings
B．the third kind of learning
C．further examples of learning through operant conditioning
D．none of the above
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单项选择题
What's the author's main purpose in writing the passage
A．To teach children how to learn to produce and experience certain emotions.
B．To give the general reader an account of two basic kinds of learning.
C．To give parents some advice on how to modify their children's emotions through earning.
D．To discuss with psychologists how positive and negative feelings are produced.
单项选择题
If a child is bitten or startled several times by a dog, he may learn to associate furry animals with pain or startle and thus develop a fear of furry animals. This is a typical example of learning through ______.
A．classical conditioning
B．operant conditioning
C．both of them
D．neither of them
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