19. Which of the following conditions is best described as "asymptomatic"?
(A) an infection that does not cause noticeable symptoms
(B) a disease with severe and sudden symptoms
(C) a disorder requiring long-term treatment
(D) a condition that requires immediate surgery
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統計: A(16), B(0), C(0), D(0), E(0) #3421704
統計: A(16), B(0), C(0), D(0), E(0) #3421704