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问题 填空题
比较大小：π______ 3.14；|-3.5|______-（-3）；-
4
5
______-
3
4
．
答案

π＞3.14；

∵|-3.5|=3.5，-（-3）=3，

∴|-3.5|＞-（-3）；

∵|-

4
5
|=
4
5
=
16
20
，|-
3
4
|=
3
4
=
15
20
，

∴-

4
5
＜-
3
4
．

故答案为＞，＞，＜．

单项选择题

在保证金交易中，投资银行可以以客户的证券作为抵押，贷款给客户购进股票，这体现了投资银行在媒介资金供需过程中的( )。

A．流动性中介作用
B．期限中介作用
C．信息中介作用
D．风险中介作用
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