6. During the development, the ectoderm eventually gives rise to?
(A) Nervous system
(B) Muscle
(C) Lungs
(D) Connective tissue
(E) Digestive tube
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統計: A(51), B(0), C(3), D(2), E(2) #2993195
統計: A(51), B(0), C(3), D(2), E(2) #2993195