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孩子喜欢数学，简单爱学。
好评{"open_launch_config":{"content":"{"from":"~视频","action_url":"qngaccv79cv29i://?appKey=68939d4d3b6a4ca083cbf6d08081f111&packageId=com.tencent.qqlive&backUrl=tenvideo2%3a%2f%2f%3faction%3d66%26from%3dpinduoduo&h5Url=seckill_list.html%3ftype%3d21%26_p_ads_channel%3dgdt%26_p_launch_type%3dadv%26_p_ads_id%3d71634410"}","sha1":"d64a0cecdd945e68ec6bb1ca1855816053462c84"}}