经营者的下列行为，未违反《消费者权益保护法》规定的义务的是( )。
A．店堂告示“商品销售一旦售出概不退换”
B．店堂告示“未成年人需由成年人陪伴方可入内”
C．顾客购买两条毛巾索要发票，经营者以“小额商品，不开发票”为由加以拒绝
D．出售蛋类食品的价格经常变化
参考答案：D
解析： A、B、C三个选项违法了《消费者权益保护法》规定的经营者的义务当中的公平合理交易的义务和出具凭证和单据的义务。在实际生活中，并不是所有的销售商品都要向消费者出具购货凭证和服务单据的，一些即时清洁交易或者数额较小的服务项目，一般不需要出具购货凭证和服务单据。但消费者向经营者索要购货凭证和服务单据的，经营者必须出具。《消费者权益保护法》规定格式合同、通知、声明、店堂告示等含有对消费者不公平、不合理规定的，其内容无效。
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| Last weekend, I helped my friend Alex get money for poor children at Crossroads Mall. He 1 needed volunteers, especially of the female. I decided that this was a pretty good 2 , so the next day I got ready to go. I arrived at Crossroads about five minutes 3 , and helped Alex and 4 of the volunteers. There were only three 5 at first, and we figured we might as well get started 6 just waiting for more to arrive. I held the 7 , and suddenly felt extremely shy. I did not 8 asking people for donations. In fact, I'm usually one of those people who try to 9 those boring stands and ask you for a little contribution. For heaven's sake, I can contribute to a few, 10 I cannot alone 11 every single cause in the world! I really didn't like the idea of asking anyone for donations to our cause. 12 , I watched my friends speak to the strangers, and noticed that they were extra polite to everyone-no matter whether they 13 . I realized that 14 I wasn't pushy (强求的), it would be okay, and my conscience could be 15 . I pasted on a large smile, and started asking people passing by. My mouth tripped over words, and I continually said"um" while I thought of the correct terms. 16 I talked to more and more people. Not only improved, but also started noticing small 17 . Instead of saying "donate", which made most people walk away 18 . I started suing the word "contribute". I added the phrase "every little bit counts", and people started to donate small amounts in larger quantities. As the day went on, I learned how to pull on the hearts of the 19 , and I became a successful fundraiser. At the end of the day, we all gathered at Alex's house and 20 how much money we raised. I was so surprised: we raised over $300! We celebrated, and went home tired, but satisfied that we helped a great cause. | ||||
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