题型分类：否定事实信息题

原文定位：定位词 an advantage of paper over parchment。题干问的是与羊皮纸相比，纸张的优点是什么。因为是否定事实信息题，要求我们选出没有提及的优点，说明在这两段中将会包含多个纸张胜过羊皮纸的优点。我们结合选项一一查找文中信息。

选项分析：

C 选项说能够生产出不同重量和厚度的纸张。文中无此信息，属于无中生有。

A 选项说很难擦掉或修改写在纸张上的内容。对应第二段第四句 Writing in ink on paper, unlike parchment, could not easily be erased, and therefore paper had the advantage that it was difficult to alter what was written on it。

B 选项说更多的纸张能够被钉在一册中。对应第三段第三句 Paper is thinner than parchment, so more pages could be enclosed within a single volume。

D 选项说更多人可以买得起书，因为制造书籍的纸张很便宜。对应第三段第二句 Although paper was never as cheap as it has become today, it was far less expensive than parchment, and therefore more people could afford to buy books。