抵押贷款的证券化降低了抵押贷款的风险，提高了抵押贷款的流动性。( )
参考答案：对
In my opinion, all Mr. Li ______ good to his students in his class at present. He is very strict with them in their studies.
A．does does does
B．does do did
C．does does do
D．did do does
在面向对象方法中，一个对象请求另一对象为其服务的方式是通过发送( )。
A．调用语句
B．命令
C．口令
D．消息
