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问题 填空题

根据首字母或汉语提示，补全单词。

1. I _____ (参加) you for breakfast this morning.

2. My mother is making soup. It smells _____(香).

3. They enjoyed _____ (种) vegetables.

4. He won, we are p_____ of him.

5. I built one of my rockets m_____ at home.

答案

1. joined  

2. delicious    

3. growing/planting  

4. proud  

5. myself

多选题

如图所示，光滑半球的半径为R，球心为O，固定在水平面上，其上方有一个光滑曲面轨道AB，高度为

R
2
．轨道底端水平并与半球顶端相切．质量为m的小球由A点静止滑下．小球在水平面上的落点为C，则（　　）

A．小球将沿半球表面做一段圆周运动后抛至C点

B．小球将从B点开始做平抛运动到达C点

C．OC之间的距离为

2
R

D．OC之间的距离为2R
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问答题

Ali is a dealer in Persian rugs. As his business has been rather slow, he placed an advertisement in the Saturday edition of his local paper stating:‘Once in a lifetime opportunity to own a handmade Persian antique rug for only ￡1,500 – cash only. This is a serious offer – the rug will go to the first person who accepts it – offer valid for one day only – today Saturday.’When Bud saw the advert, he immediately posted a letter of acceptance of Ali’s offer in order to make sure he got the rug.Cil also saw the advert and after inspecting the rug offered Ali a cheque for ￡1,500, but he refused to accept the cheque and told her she could not have the rug.Later in the day, Das asked Ali if he would keep the offer open until he could get to his bank to arrange a loan. Ali agreed, but subsequently, when Ed offered to pay ￡2,000 in cash for the rug, Ali sold the rug to him.On Monday morning Bud’s letter arrived, and Das returned to complete his purchase of the rug.Required:In the context of the rules governing the creation of contracts, advise:

(d) whether Das has any right of action against Ali. (2 marks)
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