我国建立集中、统一的证券登记结算体制具有的重大意义有( )。

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问题多项选择题

A．方便投资者开立证券账户，减少资金占用

B．对两交易所原有登记结算业务进行整合，有利于制定统一的登记结算业务规则和流程

C．有助于从体制上防范和控制市场风险

D．建立中央登记结算系统有利于提高市场结算效率

E．建立了比较完整的风险管理系统，设立结算风险保证基金以及以公司的流动资产为证券交易的集中清算、交收提供连续性和安全性的保障

答案

参考答案：A,B,C,D

解析： E项属于上海证券登记结算公司和深圳证券登记结算公司重组以前具有的特征。

选择题

已知代数式x²﹣2x+1的值为3，那么代数式3x²﹣6x+2的值为[ ]

A．6

B．8

C．10

D．12

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单项选择题

I’ve recently turned fifty, which is young for a tree, midlife for an elephant, and ancient for a sportsman. Fifty is a nice number for the states in the US or for a national speed limit but it is not a number that I was prepared to have hung on me. Fifty is supposed to be my father’s age, but now I am stuck with this number and everything it means.
A few days ago, a friend tried to cheer me up by saying, "Fifty is what forty used to be. "He had made an inspirational point: Am I over the hill People keep telling me that the hill has been moved, and I keep telling them that the high-jump bar has dropped from the six feet I once easily cleared to the four feet that is impossible for me now.
"Your are not getting older, you are getting better," says Dr. Joyce Brothers. This, however, is the kind of doctor who inspires a second opinion.
And so, as I approach the day when I cannot even jump over the tennis net, I am moved to share some thoughts on aging with you. I am moved to show how aging feels to me physically and mentally. Getting older, of course, is obviously a better change than the one that brings you eulogies (颂词，悼词). In fact, a poet named Robert Browning considered it the best change of all:
Grow old along with me!
The best is yet to me.
Whether or not Browning was right, most of my first fifty years have been golden ones, so I will settle for what is ahead being as good as what has gone by. I find myself moving toward what is ahead with a curious blend (混合) of both fighting and accepting my aging, hoping that the philosopher(哲学家) was right when he said, "Old is always fifteen years from now. \

We can infer from the passage that ______.

A．the old should lead a simple life

B．the old should face the fact of aging

C．the old should take more exercise

D．the old should fill themselves with curiosity

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