当制动器行程调得过大时，可能产生（）的现象。
A.制动力矩随之增大而松不开闸
B.电磁铁吸引力减小而松不开闸
C.动作迅速有冲击，出现较大声响
参考答案：B
Our class has some new rules. Are you for or ______ the rules?
A. in B. to C. against
