___ A. She has no idea where to find the man’s exam result. B. She isn’t allowed to tell students their grades. C. Dr. White hasn’t finished grading the papers. D. Dr. White doesn’t want to be contacted while he’s away.
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【单选题】is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication.(52)is a professional organization of individuals in ...