--- Hello! Is that Tom over there? Long time no see. Let’s say hello to him.

---Please _____ in the library.

A．keep clean

B．keep quiet

C．wait in line

D．drop litter there

投资者与证券经纪商之间的特定的经济关系建立的过程不包括( )。

A．签署《风险揭示书》《客户须知》
B．签订《证券交易委托代理协议》《客户交易结算资金第三方存管协议》
C．开立证券交易资金账户
D．分享投资收益，承担投资损失