电力系统有功功率最优分配问题的主要内容有哪些？
参考答案：有有功功率电源的最优组合，和有功功率负荷的最优分配。
选择正确答案。
( ) 1. Li Ming are getting ready (a. for b. to) school.
( ) 2. Mitts and mittens are (a. different b. the same).
( ) 3. Look (a. out b. on) of the window.
( ) 4. I like to play (a. on b. in) the snow. Let's go (a. inside b. outside).
( ) 5. I have (a. a b. two) sticks (a. for b. at) the snowman's arms.
伴随着信息技术的发展，数据存储从原先的以（）为中心的存储方式发生转变。
A、服务器
B、数据
C、应用
D、用户
