单选题
If a country turned inward and {{U}}insulated{{/U}} itself, the result would be a diminished standard of living.
A. worshiped
B. split
C. innovated
D. isolated
A
B
C
D
【正确答案】
D
【答案解析】
insulate：绝缘，孤立，隔离；worship：崇拜；split：分裂，分摊，劈开；innovate：革新，创新；isolate：隔离，孤立
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