44. The passage suggests that the speed at which communication through
pheromones occurs is dependent on how quickly they
(A) lose their effectiveness
(B) evaporate in the air
(C) travel through the air
(D) are produced by the body
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統計: A(0), B(1), C(1), D(0), E(0) #802167
統計: A(0), B(1), C(1), D(0), E(0) #802167