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 determine 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) .

（71）处应填（）。

A．use-case modeling

B．class modeling

C．dynamic modeling

D．behavioral modeling

1918年，陈独秀在《新青年》发文，痛骂义和团：“我国民要想除去现在及将来国耻的纪念碑，必须要叫义和拳不再发生……”1924年，陈独秀却在《向导》中高度赞扬义和团：“还幸亏有‘野蛮’的义和团少数人，保全了中国民族史上的一部荣誉”。造成陈独秀对义和团运动认识差距巨大的原因不包含

A．事件性质变化

B．时代背景变化

C．作者立场变化

D．主观动机变化