阿摩線上測驗
39. A blind spot is that point on the retina which is ____.
(A) defective
(B) sensitive to light
(C) not sensitive to light
(D) fully developed
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統計： A(5), B(16), C(191), D(0), E(0) #939745
統計： A(5), B(16), C(191), D(0), E(0) #939745
