38. In a smooth blood vessel, what is the relationship between blood pressure and the velocity of
blood flow?
(A) When blood pressure is low, velocity is high.
(B) When blood pressure is low, velocity is low.
(C) When blood pressure is high, velocity is low.
(D) Velocity is always constant while blood pressure varies.
(E) Blood pressure is always constant while velocity varies.
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統計: A(1), B(89), C(5), D(4), E(4) #2911246
統計: A(1), B(89), C(5), D(4), E(4) #2911246