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刷刷题刷刷变学霸
举一反三
【单选题】Can trees talk Yes, but not in words. Scientists have reason to believe that trees do communicate with each other. Not long ago, researchers learned some surprising things. First, a willow tree attack...
A.
touching one another
B.
C.
B. smelling one another
D.
C. making unusual sounds
E.
D. making special movements
【单选题】Man, even in the lower stages of development, possesses a faculty which, for want of a better name, I shall call Number Sense. This faculty permits him to recognize that something has changed in a sma...
A.
dependent on simpler mental activity
B.
found in animals as well as man
C.
farther up the evolutionary scale
D.
present in animals on the basis of much evidence