16.The most common cause of skin cancer is ________ to ultraviolet radiation from the sun.
(A) address
(B) exposure
(C) introduction
(D) vacation
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統計: A(0), B(34), C(4), D(0), E(0) #3181625
統計: A(0), B(34), C(4), D(0), E(0) #3181625
詳解 (共 2 筆)
#6186931
ultraviolet 紫外線
radiation 輻射
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