单选题：1、鼓式制动器的固定元件是（      ）。 A.
制动鼓 B.
制动蹄 C.
制动盘 D.
制动钳

A．咸鱼
B．牛奶
C．果汁
D．酱油

A．Other people were not bothered by what I did, but if you are, I’m sorry.
B．I’m really sorry for being late again.
C．I cannot express how sorry I am for telling Lucy your secret.
D．I’m sorry that I hurt your feeling yesterday.