公安行政复议是公安机关内部进行自我监督的有效法律途径。( )
参考答案：对
-Hi,Ann! I won the first prize in the English Speech Contest.
-Congratulations!And I guess your parents must____you.
A．be mad at
B．be proud of
C．be angry with
D．be impolite to
柱式回转支撑门机的水平轮单边径向磨损不得大于（）mm。
A.5
B.10
C.20
D.30
