浮力产生的原因_____________浮力的方向总是 ．
液体（或气体）对物体上下表面的压力差；竖直向上
开放作文。
请根据下面提示，写一篇短文。词数不少于50。
In your English class, the teacher shows the picture below and asks the class to discuss it. Your
classmates may have different understandings. Look at the picture carefully and tell the crass how
YOU understand it.
______________________________________________________________________________
_________________________________________________________________________________
土地还原利率为7.0%，房屋还原利率为9.6%，则房地产综合还原利率可能为（）。
A．6.5%
B．7.0%
C．8.5%
D．9.6%
