阅读诗歌，回答问题。

                                                                                                            望    岳
                                                                                                              杜甫
                                                                                            岱宗夫如何？齐鲁青末了。
                                                                                            造化钟神秀，阴阳割昏晓。
                                                                                            荡胸生曾云，决眦入归鸟。
                                                                                            会当凌绝顶，一览众山小。

实验室用Na₂CO₃固体配制250mL 1.00mol/L的Na₂CO₃溶液，填空并请回答下列问题：

北宋前期，四川地区出现了“会子”，是世界上最早的纸币。（  ）