房地产开发属于资金密集型经济活动，所以房地产开发公司的（）一

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问题单项选择题

房地产开发属于资金密集型经济活动，所以房地产开发公司的（）一般较高。

A.偿债备付率

B.投资回报率

C.资产负债率

D.现金回报率

答案

参考答案：C

补全对话，情景问答

1.	A: ___________ does your father go ___________ Dalian? B: He ___________ there by ___________.
2.	A: ___________ do they like? B: They like ___________ ___________.
3.	A: ___________ does he do? B: He is a ___________.
4.	A: ___________ are you ___________ to do this evening? B: I'm going to ___________ ___________.
5.	A: ___________ can you see in the picture? B: I can see the ___________.

单项选择题

微分方程y″-4y′=xe^4x的待定特解的形式为( )。

A．y^*=x(Ax+B)e^4x
B．y^*=xe^4x
C．y^*=(Ax+B)e^4x
D．y^*=Axe^4x