7. Which one of the following is not among the four most abundant elements in living organisms?
(A)Carbon
(B)Hydrogen
(C)Nitrogen
(D)Oxygen
(E)Phosphorus

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統計： A(0), B(0), C(0), D(0), E(3) #2789656

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#5526357
E
(共 3 字，隱藏中）
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