who is he? He is one of friends, professor.
Professor is hungry. He want to eat something and drink something.
how many steps the professor need to move to get xxx?
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15855151033
开始学习课时 S4+ 组微课程 C
15855151033
开始学习课时 S4+ 组微课程 A
陈琢CLC016000358
学完了课时 S2-S3组微课程 B
陈琢CLC016000358
开始学习课时 S2-S3组微课程 B