单项选择题

Why is the reading system for the blind called the Braille

A．Because it was invented by the person called Braille.
B．Because it was first used by the person called Braille.
C．It is unknown.

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单项选择题

单项选择题

Why is the reading system for the blind called the Braille 您的浏览器不支持 audio 元素。