下列哪个符号不能作为VB中的变量名？（）A.Xyab B.H1K2 C.76TK D

I grew up in the 1950s with very practical parents. My mother washed aluminum foil（铝箔纸）after she cooked in it, and then she reused it. She was the earliest recycle（回收）queen before people had a name for it．

My father was no different. He preferred getting old shoes fixed to -buying new ones. Their  marriage was good and their dreams were focused（集中）．Their best friends lived just a wave away. Though my parents have passed away, I can see them now - Dad in trousers, a T-shirt and a hat and Mom in a house dress, lawnmower（割草机）in one hand and dishtowel in the other.

It was the time to fix things -a curtain rod(挂帘杆),the kitchen radio, the screen door, the oven door, and so on. They fixed all things we had. It was a way of life, and sometimes it made me crazy. All that re-fixing and renewing made me want to scream.1 wanted just once to be wasteful. Waste meant being rich. Throwing things away meant you knew there'd always be more. I often thought like that.

But then my mother died, and on that clear summer night, in the warmth of the hospital room, I learned that sometimes there isn't any more. Sometimes, what we care about most gets all used up and goes away and it will never return. So, while we have it, it is the best that we love it, care for it, fix it when it's broken and cure it when it's sick.

This is true for marriage, old cars, children with bad report cards, dogs with bad hips and aging parents and grandparents. We keep them because they are worth it and because we are worth it.

小题1:We can learn that when the writer was young, she_______.

A．thought highly of her parents' habits

B．often helped her parents fix old things

C．often threw things away without being noticed

D．at times hated it when her parents fixed old things小题2:What did the writer realize afier her mother's death?

A．Her mother truly loved her.

B．She had wasted a lot of money.

C．Things may never return once they are gone.

D．She had hurt her parents for many times.小题3:What is the writer's purpose in writing the passage?

A．To advise us to love what we have.

B．To encourage us to recycle old things.

C．To explain why her parents recycled.

D．To help us know about life in the past.

数对（6，4）表示的是第______列第______行的位置．数对（2，3）表示的是第______行第______列的位置．

患者，女性，25岁，因骨折手术，术中输入A型悬浮红细胞200mL后，出现腰痛，血压下降，继续输血，血压下降更甚，尿液呈酱油色。

治疗着重于（）。

A.抗休克和保肾

B.强心药物

C.大量广谱抗生素

D.保肝药物

E.静脉注射葡萄糖酸钙

生物素一亲和素系统放大作用的主要机制是（）

A.亲和素的四个生物素部位，可同时结合多价性的生物素化衍生物

B.生物素、亲和素可分别与酶、放射性核素等结合形成标志物

C.两者之间极高的亲和力

D.经化学修饰生物素成为活化生物素

E.以上均不是

价值培养型投资理念是一种投资风险共担型的投资理念。该理念指导下的投资行为，既分享证券内在价值成长，也共担证券价值成长风险。( )