科学工作者将一株矮杆低产的小麦与一株高杆高产的小麦进行杂交，在后代植侏中，出现了矮杆低产、高杆高产、矮杆高产、高杆低产四种类型的小麦．请分析回答：

（1）人们应该选出其中哪种植株继续多代繁殖培育，从而得到有利于人类的新品种小麦？______．

（2）题中涉及到的小麦性状中，属于相对性状的有：______、______．

（3）杂交亲代中的矮杆低产和高杆高产性状在后代中依然出现，这种与亲代相似的现象叫做______，后代中出现了矮杆高产和高杆低产两种新类型，这种与亲代不同的现象叫做______．

A department store made an announcement in the local newspaper to launch a bonus sale promotion in July 2008. Under this promotion plan any consumer who bought commodities for RMB 200 yuan would be granted one bonus coupon with a particular number for a lucky-draw. The lucky-draw would be made publicly on 31 July 2008. During July Mr Zhou received five coupons for buying commodities totalling more than RMB 1,000 yuan in the department store.On 31 July 2008 the department store made the lucky-draw in public and announced all the numbers of coupons in winning the bonus.On 2 August 2008 the department store put a written notice on the notice board in the front of its premises, stating that the winners should come to cash the bonus before 10 August 2008, otherwise they should be regarded as automatically giving up the bonus.On 12 August 2008 Mr Zhou got to know the lucky number on one of his coupons was the same as the lucky number for the first class bonus of RMB 5,000 yuan. He went to the department store to cash the bonus but was refused by the department store on the grounds that he was too late to take the bonus.Required:Answer the following questions in accordance with the relevant provisions of the Contract Law of China and give your reasons for your answers:

(c) State the legal nature of the department store’s public notice indicating the time limit for cashing the bonus after the lucky-draw and whether the notice was in accordance with the law. (4 marks)