47. What is the main topic of this article?
(A) A type of head trauma caused by certain sports.
(B) The results of study done on concussions.
(C) Ways to reduce brain injuries in professional sports players.
(D) The way disoriented sports players conduct themselves.
詳解 (共 3 筆)
未解鎖
It goes without sayi...
未解鎖
不用說，一些接觸性運動特別殘酷，可能會導...
未解鎖
(A) 由某些運動引起的一種頭部外傷。(...
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