单项选择题

Behaviorists believe that______.

A．humans should behave mechanically
B．human behavior patterns are based on biological and genetic factors
C．human behavior is determined mainly by their surroundings
D．factors in the environment have little influence on people's personalities.
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单项选择题
Which of the following would be the best title for the passage
A．Nature or Nurture.
B．Cooperative or Competitive.
C．Intelligence: Product of Experiences.
D．Behavior: Product of Instincts.
单项选择题
If a child starts to speak later than others, he will ______in the future.
A．have a high IQ
B．be less intelligent
C．be insensitive to verbal signals
D．not necessarily be backward
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