D．Train tickets online are available at any time within 30 days before you leave.

　　解析　A　细节理解题。根据Quick guide on China train travel部分的第一句可知，在中国乘火车旅行是经济实惠且舒适的，故选A项。

　　2．If Mr Smith needs to travel from Jinan to Beijing for something urgent, he'd better take ________.

　　A．G trains B．Z trains

　　C．T trains D．overnight trains

　　解析　A　推理判断题。根据How to choose train types部分的倒数第二句可知，高铁是中国速度最快的火车，有急事应选择高铁；同时根据该部分可知，高铁、动车、城铁这样的快速列车主要在省会城市和一线城市间运行，济南、北京分别是省会和一线城市，有高铁通行，故选A项。

　　3．Who are the intended readers of the passage?

　　A．Native tourists． B．Travel agencies．

　　C．Foreign travelers． D．Businessmen.

　　解析　C　推理判断题。通读全文，尤其根据Quick guide on China train travel部分的第一句及How to buy train tickets部分的At the train station/local ticket agency with your passport可推知，本文的目标读者应该是外国游客，故选C项。

　　B

课标话题 人与社会·法律常识与法治意识 体裁 说明文 词 数 215 难度 　　(2019·重庆南开中学摸底)China's first law on public libraries officially came into effect from 2018.

　　The law, passed by the National People's Congress Standing Committee on Nov 4, 2017, asks governments at county levels or above to establish public libraries to provide reading space for residents and improve cultural developments.

　　The law, with the aim of delivering better services to the public, states that modern technology should be integrated(结合) into public libraries, with more digital content and networks.

　　According to the law, public libraries shall strengthen the protection of ancient books, and publicise books by exhibitions, lectures and reproductions to spread Chinese traditional culture.

"Public libraries must not hold or allow organisations or individuals to hold activities that go against the laws, including those that harm the national security or infringe on(限制) public