矛盾的斗争性和同一性的辩证关系原理的方法论意义及表现有
A．在对立中把握同一
B．在同一中把握对立
C．异中求同
D．同中求异
参考答案：A,B,C,D
从传声器输出端测得的交流阻抗定义为传声器的______。
My persistence finally________when they called me in for an interview.[ ]
A. paid back
B. paid up
C. paid off
D. paid for
