制动摩擦片磨损的厚度超过原厚度的（）时，应更换新的摩擦片。
A、50%
B、40%
C、30%
参考答案：A
A “check” line is（）.
A.a safety line attached to a man working over the side
B.used to measure water depth
C.used to slow the headway of a barge
D.used to measure the overhead height of a bridge
1.洪都公司如申请执行，则其申请执行的期限为多少，如何计算
