36. What thing gave men the biggest advantage over animals?
(A) the discovery of metal
(B) weapons of rock and bone and sharpened wood and bone
(C) superior intelligence
(D) living in certain locations
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統計: A(4), B(8), C(44), D(3), E(0) #1219786
統計: A(4), B(8), C(44), D(3), E(0) #1219786