受赠人有下列哪些情形之一的，赠与人不可以撤销赠与( )A．严重侵害赠与人或者赠与人

患者，女，45岁，因左侧面颊部皮肤及左侧舌部黏膜发红、起疱3天，伴剧痛来诊。查体：体温38.5℃，左侧面部皮肤及左侧舌背、颊黏膜可见粟粒大小的密集成片的透明水疱，周围皮肤黏膜可见充血性红斑。化验：红细胞7.8×10g／L，中性62%，淋巴34%。拟诊断为带状疱疹。

带状疱疹与单纯疱疹的最主要鉴别点在于（）

A.病因不同

B.前驱症状不同

C.病程长短不同

D.临床表现不同

E.全身症状不同

市场风险加权资产等于市场风险资本要求除以12.5。（）

Ali is an antique dealer and one Saturday in November 2007 he put a vase in the window of his shop with a sign which stated ‘exceptional piece of 19th century pottery – on offer for €500’.Ben happened to notice the vase as he walked past the shop and thought he would like to have it. Unfortunately, as he was late for an important meeting, he could not go into the shop to buy it, but as soon as his meeting was finished he wrote to Ali agreeing to buy the vase for the stated price of €500. The letter was posted at 11:30 am.Later on the same day, Chet visited Ali’s shop and said he would like the vase but was only willing to pay €400 for it. Ali replied that he would accept €450 for the vase, but Chet insisted that he was only willing to pay €400 and left the shop. However, on his journey home Chet realised that €450 was actually a very good price for the vase and he immediately wrote to Ali agreeing to buy it for that price. His letter was posted at 12:30 pm.Just before closing time at 5 pm. Di came into Ali’s shop and she also offered €400 for the vase. This time Ali agreed to sell the vase at that price and Di promised to return the following Monday with the money.On the Monday morning Ali received both of the letters from Ben and Chet before Di could arrive to pay and collect the vase.Required:From the point of view of the law of contract advise Ali as to his legal relations with Ben, Chet and Di. (10 marks)

物体由于          而具有的能叫做重力势能，物体         越大，         越高，它具有的重力势能就越大。

佛手的作用是（）

A.理气和胃，化湿止呕

B.行气调中，燥湿化痰

C.疏肝理气，和中化痰

D.疏肝破气，散结消滞

E.疏肝理气，调经止痛