句型转换。

1. Please be very quiet in the classroom. (改为否定句)

    Please______very quiet in the classroom.

2. I like dolphins because they are friendly. (对画线部分提问)

    __   _    you like dolphins?

3. Where do you come from? (改为同义句)

    Where_____you ____  ?

4. We can't finish the work without your help.(用 if 变换句子)

    We can't finish the work_____you_____us.

5. There is a football club near here. (改为一般疑问句)

               a football club near here?

以每股利润最大化作为财务管理目标，其优点是( )。

A．考虑了资金的时间价值

B．考虑了投资的风险价值

C．有利于企业克服短期行为

D．反映了投入资本与收益的对比关系