体液平衡中．细胞外液中最重要的阳离子是A．Na- B．K+ C．Mg2+ D．Mn2

That warm day was the only day of the week without rain．I opened the door,took a seat and began to enjoy the wonderful sunshine．Suddenly,I noticed that the house near mine had been sold．An elderly lady was in front of the door,with some beautiful flowers beside her．I walked to her．She looked to be in her early eighties and had the prettiest white hair．

“Hi！My name is Karmen,”I said smiling brightly at the old lady．She smiled back and said,“Hello,Karmen．I ’m Henrietta．”Her voice was very strong for someone at her age．Later，I learned she was alone and had no family or relatives to help her．From that day on,I often visited her and helped her with her housework and sometimes she gave me some delicious food．A year passed,and I considered Henrietta to be one of my best friends．

One day,I walked over for my morning visit and knocked on the door,but there was no answer．I knocked again,and she still didn’t turn up．So I let myself in,using the key she had given me．I checked her living room and then her kitchen．I finally went into her bedroom,and she was lying peacefully on her bed．Beside her there were two notes．One was her will（遗嘱）,which said all that she had would be given to me．The other was a thank-you note．I went to her bedside and cried sadly．

Though several years have gone by,I still miss her deeply．Whenever I look at the beautiful flowers in front of her house,I remember the wonderful friendship we had．

小题1:The writer came out of the house to ______．

A．look at an old lady

B．enjoy some flowers

C．enjoy the sunshine

D．clean the house nearby小题2:Through visiting the old lady,the writer learnt that the old lady ______．

A．disliked all her relatives

B．had no one to look after her

C．didn’t want to live with her family

D．was looking for someone to look after her小题3:What can we learn from the passage?

A．The old lady was not kind．

B．The writer didn’t have any good friends．

C．The old lady didn’t know how to make food．

D．The writer got along very well with the old lady．小题4:What does the underlined part “turn up”in Paragraph 3 mean?

A．Appear

B．Leave

C．Try

D．Change

下列哪项不符合肾细胞癌的CT表现（）

A.平扫多呈等密度或略低密度

B.较大肾癌密度多不均匀

C.中心或边缘可有钙化

D.肾静脉和下腔静脉可有癌栓

E.增强扫描实质期肿瘤强化多高于肾实质

有限合伙中的有限合伙人（）。

A.不参与企业的经营管理，他的行为对企业无拘束力

B.他们对合伙的债务承担无限责任

C.他们对合伙的债务承担有限责任

D.有权审查企业的帐目

无机杀菌剂

吐舌的特征为（）

A.舌伸出口外，不能立即回缩

B.舌体动摇不宁

C.伸舌即回缩

D.反复舐口唇四周，动摇不宁

E.舌体不自主颤动