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【单选题】Passage Three Musicians are fascinated with the possibility that music may be found in nature; it makes our own desire for art seem all the more essential. Over the past few years no les...
A.
music should replace language as the major arena of animal research
B.
animal experiments are more often than not cruel and inhuman
C.
great progress has been made in the field of interspecies communication
D.
the experiment with music may help scientific research on animals
【单选题】儿童心理的（），是指儿童能够独立表现出来的心理发展水平，和儿童在成人指导下所能够表现出来的心理发展水平之间的差距。
A.
关键期
B.
原始期
C.
最近发展区
D.
最佳期