信息系统的生命周期包括
参考答案：是指提供给最终用户的灵活性，称为解决问题的灵活性。
The books in the largest library of the city could _____ all the information we need for
us. [ ]
A. provide
B. offer
C. present
D. supply
药材西红花的药用部位是（）
A.花
B.花序
C.花蕾
D.花粉
E.柱头
