A.三次,1000元,2000元,5000元; B.二次,100元,200元,500元; C.二次,1000元,2000元,5000元; D.三次,100元,200元,500元;
A.12個(gè)月; B.3個(gè)月; C.9個(gè)月; D.6個(gè)月;