单项选择题

The babies would "smile and bubble" at the lights because（）

A．the lights were directly related to some basic "drives"
B．the sight of the lights was interesting
C．they need not turn back to watch the lights
D．they succeeded in "switching on" the lights

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单项选择题

According to Papusek, the pleasure babies get in achieving something is a reflection of （）

A．a basic human desire to understand and control the world
B．the satisfaction of certain physiological needs
C．their strong desire to solve complex problems
D．a fundamental human urge to display their learned skills

单项选择题

Papusek noticed in his studies that 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
D．would turn its head to right or left when it had enough to drink