[单项选择]

In the same way that a child must be able to move his arms and legs before he can learn to walk, the child must physiologically be capable of producing and experiencing particular emotions before these emotions can be modified through learning. Psychologists have found that there are two basic processes by which learning takes place. One kind of learning is called "classical conditioning". This occurs when one event or stimulus is consistently paired with or followed by, a reward or punishment. It is through classical conditioning that a child learns to associates his mother's face and voice with happiness and love, for he learns that this person provides food and comfort. Negative emotions are learned in a similar fashion.
The second kind of learning is called "operant conditioning". This occurs when an individual learns to do things that produce rewards in his environment and learns not to do things that produce punishments. For example, if a mot
A. classical conditioning
B. neither of them
C. operant conditioning
D. some other sorts of conditioning

[单项选择]

In the same way that a child must be able to move his arms and legs before he can learn to walk, the child must physiologically be capable of producing and experiencing particular emotions before these emotions can be modified through learning. Psychologists have found that there are two basic processes by which learning takes place. One kind of learning is called "classical conditioning". This occurs when one event or stimulus is consistently paired with or followed by, a reward or punishment. It is through classical conditioning that a child learns to associates his mother's face and voice with happiness and love, for he learns that this person provides food and comfort. Negative emotions are learned in a similar fashion.
The second kind of learning is called "operant conditioning". This occurs when an individual learns to do things that produce rewards in his environment and learns not to do things that produce punishments. For example, if a mot
A. teach children how to learn to produce and experience certain emotions
B. give the general reader an account of two basic kinds of learning
C. give parents some advice on how to modify their children's emotions through learning
D. discuss with psychologists how positive and negative feelings are produced

[单项选择]We must find a way to cut prices______ reducing our profits too much.
A. without
B. despite
C. with
D. for

[单项选择]We must find a way to cut prices ________ reducing our profits too much.
A. without
B. despite
C. with
D. for

[单项选择]Being able to move gives animals many advantages, but it also generates its own demands. For any animal, ______ movement can be unhelpful or even dangerous.
A. ransom
B. retrieve
C. random
D. redeem

[单项选择]A politician must be able to ______ public criticism.
A. ascertain
B. correspond
C. withstand
D. encounter

[单项选择]Either of you ______ able to move that stone.
A. are
B. is
C. have been
D. be

[单项选择]Something must have happened on their way here. Or they ______ by now.
A. should have arrived
B. should arrive
C. would have arrived
D. would arrive

[单项选择]The child should always ______ the same basic procedure: seeing the whole word-hearing and pronouncing-writing from memory.
A. go through
B. take over
C. respond to
D. carry off

[单项选择]It's essential that every child ______ the same educational opportunities.
A. has
B. have
C. had
D. will have

[单项选择]A way must be thought of （） his wound,otherwise he might bleed to （）.
A. to stop；die
B. stopping；death
C. to stop；death
D. stopping；dead

[单项选择]If you move，you must inform us _____ the change of you adderss.
A. with
B. for
C. in
D. of

[单项选择]Certainly man must ______ the future, and find ways of providing for his use.
A. look to
B. look up
C. look for
D. look on