阿摩線上測驗
38. The urinary system is the main system of body parts involved in ______, which is the expulsion of unwanted substances.
(A) excrement
(B) excrescence
(C) excerpt
(D) excretion
(E) exegesis
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統計： A(0), B(0), C(0), D(3), E(0) #3341263
統計： A(0), B(0), C(0), D(3), E(0) #3341263
