68. Which of the following shows the correct direction of blood flow through the chambers of the heart?
(A) left atrium -> left ventricle -> right ventricle -> right atrium
(B) left atrium -> right atrium -> left ventricle -> right ventricle
(C)right atrium -> right ventricle -> left atrium -> left ventricle
(D) right atrium -> left atrium -> left ventricle -> right ventricle
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統計: A(6), B(0), C(71), D(1), E(0) #2911824
統計: A(6), B(0), C(71), D(1), E(0) #2911824