计算时运用了乘法什?
卜*** 2013-10-31 16:14:26 举报
http://new.060s.com/center/stalnn/all/t-%253D%253Dg9X7Ox37r2%252Fi6tLPrrjCTMaPNy1WD1Sv8syc%252F1BbLMkNGZ_69934.html