[audioFiles]audio_eusm_0102(20106)[/audioFiles]A、To introduce the categories of

游客2023-09-12  10

问题  

选项 A、To introduce the categories of books in the US libraries.
B、To explain roles of different US libraries.
C、To define the circulation system of US libraries.
D、To demonstrate the importance of US libraries.

答案 B

解析
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