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！

参考答案

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