题型分类:指代题
题干分析:定位句“Between 200 B.C and A.D 300, this was supplemented by vellum, calf skin treated and then smoothed by pumice stone.”中,this 指代往前一句找,可以看到前一句“The world of antiquity had recorded its writings mainly on papyrus.”所以 this 只能指代 papyrus。
选项分析:
D选项:是前句中出现的 papyrus,正确。
A选项:下一句才出现羊皮纸,故错误。
B选项:p石头只是用来生产 vellum 的东西,故错误。
C选项:calf skin 是 vellum 的原材料,故错误。
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