21. Which of the following procedures is considered "minimally invasive"?
(A) open-heart surgery
(B) laparoscopic surgery
(C) total knee replacement
(D) craniotomy
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統計: A(0), B(12), C(1), D(3), E(0) #3421706
統計: A(0), B(12), C(1), D(3), E(0) #3421706