单选题
How did Braille make use of raised dots in his code?
A、
He used them for the 26 letters of the alphabet.
B、
He used them for pictures.
C、
He used them for punctuation marks and short words.
D、
Both A and C.
【正确答案】
D
【答案解析】
解析：由文章倒数第二段可知，布拉耶用这种小凸点做成了26个字母、标点和短单词。
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