丰子恺先生有一幅漫画叫《人世几回伤往事，山形依旧枕江流》，这幅画的题目和意境来自于刘

Object-oriented analysis (OOA) is a semiformal specification technique for the object-oriented paradigm. Object-oriented analysis consists of three steps. The first step is (71) . It determines how the various results are computed by the product and presents this information in the form of a (72) and associated scenarios. The second is (73) , which determines the classes and their attributes, then determines the interrelationships and interaction among the classes. The last step is (74) , which determines the actions performed by or to each class or subclass and presents this information in the form of (75) .

（72）处填（）。

A．component diagram

B．sequence diagram

C．interactive Diagram

D．use-case diagram

火车8：20从广州开往韶关，经过2小时20分到达韶关．到达韶关的时间是______时______分．

23个32是多少？

用户使用手机搜索输入“中国连通”时，系统提示“是不是要找中国联通”，这体现了手机搜索的以下哪种特色功能（）

A.关键字纠错功能

B.位置搜索

C.相关搜索功能

D.热点推荐功能

环保型低汞触媒与普通高汞触媒的性能对比？