单项选择题

The ideal title for this passage is （）

A．The Eel
B．Torpedo
C．Electric Fish
D．Electric Power

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热门试题

单项选择题

In Papusek's experiment babies make learned movements of the head in order to（）

A．have the lights turned on
B．be rewarded with milk
C．please their parents
D．be praised

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