根据轴承的工作情况，轴瓦材料应有( )等性能。
A．摩擦系数小
B．导热性好
C．热膨胀系数大
D．耐磨
E．耐蚀
参考答案：A,B,D,E
With more people ____ the traffic rules, our city is becoming better organized. [ ]
A. respect
B. being respected
C. respected
D. respecting
粉尘采样器的工作原理是什么？
respected