問題詳情
54. The brain operation was made possible mainly by _______.
(A)taking the blood out of the brain
(B)trying the operation on monkeys first
(C)having the blood go through a machine
(D)lowering the brain' s temperature
(A)taking the blood out of the brain
(B)trying the operation on monkeys first
(C)having the blood go through a machine
(D)lowering the brain' s temperature
參考答案
答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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