What is the purpose of the talk
A、Toreviewwhatstudentsknowaboutvolcanicactivity.
B、Todemonstratetheuseofanewmeasurementdevice.
C、Toexplaintheanswertoanexaminationquestion.
D、Toprovidebackgroundforthenextreadingassignment.
发布时间：2024-09-23 06:50:07
