4. How do insects exchange gases?
(A) Using lungs
(B) Through skin diffusion
(C) Via tracheal system
(D) Through hemoglobin
(E) With gills
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統計: A(0), B(1), C(9), D(1), E(0) #3429683
統計: A(0), B(1), C(9), D(1), E(0) #3429683