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问题 单项选择题

图示铰盘有三个等长为l的柄，三个柄均在水平面内，其间夹角都是120°。如在水平面内，每个柄端分别作用一垂直于柄的力F1、F2、F3，且有F1=F2=F3=F，该力系向O点简化后的主矢及主矩应为（）。

A.FR=0，MO=3Fl，（→）

B.FR=0，MO=3Fl，（←）

C.FR=2F，（水平向右），MO=3Fl，（→）

D.FR=2F，（水平向左），MO=3Fl，（←）

答案

参考答案：B

解析：

今年是中法建交50周年。就在那一年，我国在科技方面出现的重大突破是

A．成功爆炸第一颗原子弹

B．成功培育籼型杂交水稻

C．成功发射第一颗人造地球卫星

D．成功发射用于实战的导弹
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问答题

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:

(b) State whether Mr Zhou was entitled to receive the bonus when he went to the department store two days later than the time limit as fixed by the department store in the notice of 2 August 2008. (4 marks)
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