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wush978 / DataScienceAndR

R語言翻轉教室
www.datascienceandr.org
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02-RDataEngineer-02-XML @35% #259

Closed JohnsonHsieh closed 8 years ago

JohnsonHsieh commented 8 years ago

關卡：請同學輸入指令檢查doc1的型態。

輸入doc1就會直接過關