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According to the man, we use the library online service mainly to______.A.avoid talking to


According to the man, we use the library online service mainly to______.

A.avoid talking to the library staff

B.check whether the library has the books we want

C.check the library"s open time

D.help improve the working efficiency of the library staff

请帮忙给出正确答案和分析,谢谢!

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