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毎日1問、正解者には5つの富が報酬として与えられ、参加すると2つの富がもらえます;第309題 [

2016-06-08View Original

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選択:イソペンタンはなし()。 A、第一級炭素 B、第二級炭素 C、第三級炭素 D、第四級炭素 C、第三級炭素
Reply #22016-06-08
この親戚たち、一人も知らない
Reply #32016-06-08
屋上には、これらの親戚たちが東南西北を象徴している!

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