50. Food moves along the digestive tract as the result of contractions by
(A) cardiac muscles
(B) smooth muscles
(C) voluntary muscles
(D) striated muscles

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統計： A(0), B(1), C(0), D(0), E(0) #3389875

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#6800606
1. 題目解析 這道題目問的是食物在消化...
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