优选学
参考答案：
优选学所研究的是运用数学手段迅速和合理地确定最优方案的理论、模型和方法。我国数学家华罗庚在发展和推广优选学方面有重要贡献。
－ Father, you promised!
－ Well, _______. But it was you who didn't keep your words first. [ ]
A. so was I
B. so did I
C. so I was
D. so I did
192.168.1.1是正确的IP地址表示形式。
