The tendency of the human body to reject foreign matter is the main obstacle to

游客2025-01-31 7

问题 The tendency of the human body to reject foreign matter is the main obstacle to successful organ transplantation.

选项 A、factor
B、constituent
C、barrier
D、break

答案 C

解析题干中的obstacle意为“妨碍”。A项“要素”；B项“成分”；C项“障碍”；D项“裂口”。只有C项与题干中划线单词意义相近。

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