30. The tracheae of adult terrestrial insects have been a factor in the great abundance of insects because they serve the
same function in terms of the delivery of respiratory gases to the cells as do
(A)the gills of aquatic insects.
(B)the lungs of mammals.
(C)the book lungs of spiders.
(D) the closed circulatory system of cephalopods.
(E) the Malpighian tubules of spiders.
阿摩線上測驗
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