What does the underlined word" they" (line 3 , Para. 3) refer to?
[ A] Rare books.
[ B ] Library users. .
[ C] Book owners.
[ D] Library conditions.
第2题
人类发展史某种意义上就是一部标准化史。语言文字就是最基本的“标准”,否则人们无法沟通。()
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