补全下面的对话。
A．Size 8，please．
B．These shoes are nice．
C．I will take them．
D．How much are they?
E．Here you are．
A：Can I help you?
B：Yes．____Can I try them on?
A：Of course．
B：____
A：OK．____
A：$50．
B：Here is the money．____
下列动物的特征中能够增大压强的是 ( )
