为了给各位股民朋友提供更优质的炒股技巧，麻烦大家先做个小调查。
\n \n 你最想了解哪些股票技巧？ 多选\n \n\n \n \n \n \n\n \n 0人\n 0%\n \n\n K线图\n \n\n \n \n \n \n \n \n \n \n \n \n\n \n 0人\n 0%\n \n\n 技术指标\n \n\n \n \n \n \n \n \n \n \n \n \n\n \n 0人\n 0%\n \n\n 选股\n \n\n \n \n \n \n \n \n \n \n \n \n\n \n 0人\n 0%\n \n\n 买卖时机\n \n\n \n \n \n \n \n \n \n \n \n \n\n \n 0人\n 0%\n \n\n 黑马和牛股\n \n\n \n \n \n \n \n \n \n \n \n \n\n \n 0人\n 0%\n \n\n 跟庄\n \n\n \n \n \n \n \n \n \n \n \n \n\n \n 0人\n 0%\n \n\n 均线\n \n\n \n \n \n \n \n \n \n \n \n \n\n \n 0人\n 0%\n \n\n 成交量\n \n\n \n \n \n \n \n \n \n \n \n \n\n \n 0人\n 0%\n \n\n 短线\n \n\n \n \n \n \n \n \n \n \n \n \n\n \n 0人\n 0%\n \n\n 更多关注微信号shero898\n \n\n \n \n \n \n \n \n \n\n \n \n 投票\n \n \n
一天，有个年轻人来到鞋店里买了一双鞋子。 这双鞋子成本是15元，标价是21元。 结果是这个年轻人掏出50元要买这双鞋子。 鞋店当时没有零钱，用那50元向街坊换了50元的零钱，找给年轻人29元。 但是街坊后来发现那50元是假钞，鞋店无奈之下，还了街坊50元。 现在问题是：鞋店在这次交易中到底损失了多少钱 ?
如果您作出的答案是错误的，证明你不适合玩股票！！！ 此题10人做9人错！
答案稍后会公布，有任何疑问请联系我。