离心式风机按压力不同可分为低压、中压和（）三种。
参考答案：高压
I want to buy that kind of cloth because I ______ the cloth ______ well．
A．have told; washes
B．was told; washed
C．have been told; washes
D．have been told; is washed
在服务性设施中坐具的设计原则？
