The spacecraft will send back （）on surface wind and temperatures.

单项选择题Thebabieswould“smileandbubble”atthelightsbecause（）.

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

单项选择题InPapousek’sexperimentbabiesmakelearnedmovementsoftheheadinorderto（）.

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