19. In which of the following vessels is the blood pressure lowest?
(A) arteries
(B) arterioles
(C) capillaries
(D)venules
(E)veins
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統計: A(0), B(0), C(0), D(0), E(2) #2778308
統計: A(0), B(0), C(0), D(0), E(2) #2778308