题目

 I just couldn’t understand the former mayor _____ the money raised for children in poor areas. A. taking                   B. to take                     C. being taken              D. to be taken 答案：A已知i，m，n是正整数，且1＜i≤m＜n．（1）证明niPmi＜miPni；（2）证明（1+m）n＞（1+n）m．