应收账款的平均回收时间的计算方法有：期间平均法、倒推法和账龄分析法。
参考答案：对
I wasn’t complaining. I expressed my surprise because I had never seen this happen in that case before.
A．mostly
B．rarely
C．nearly
D．merely
厚质涂料防水层怎样做好收头处理
