单项选择题

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单项选择题
D
单项选择题
A. The invention of primitive weapons and language. B. The invention of language and the discovery of fire. C. The invention of primitive weapons and the discovery of fire. D. The invention of primitive weapons and the development of human brain.
A. The invention of primitive weapons and language.
B. The invention of language and the discovery of fire.
C. The invention of primitive weapons and the discovery of fire.
D. The invention of primitive weapons and the development of human brain.
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