Braille, the universally accepted______ of writing used by blind persons, consists of sixty-three characters.

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问题 Braille, the universally accepted______ of writing used by blind persons, consists of sixty-three characters.

选项 A、catalog
B、system
C、pattern
D、scheme

答案B

解析 catalog“目录”；system“系统”：pattern“模式”；scheme“方案”。

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大学英语四级

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