TOEFL Listening: ETS-TOEFL听力机经 - JDPN11K7DI843FY5P$

What is the main purpose of the lecture? A. To explain how archaeologists identify broken pottery B. To explain why Mayan pottery is more difficult to classify than other types of pottery C. To discuss different systems for classifying the shape of ancient pottery D. To explain why new methods of classifying Mayan pottery are necessary