The first paragraph tells us that ______. The meaning of "barrier" is ______.

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问题 The first paragraph tells us that ______.
The meaning of "barrier" is ______.

选项 A、disadvantage
B、difficulty
C、disability
D、obstacle

答案D

解析 词汇题。单词barrier的意思是“障碍”。A答案是“缺点”;D答案是“差别”,不同;C答案是“残疾”。所以选D。
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