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) .

（75）处填（）。

A．activity diagram

B．component diagram

C．sequence diagram

D．state diagram

我国《民法通则》规定，年满十六周岁不满十八周岁的公民，以自己的劳动收入为主要生活来源的，视为( )。

A．无民事行为能力人
B．限制民事行为能力人
C．完全民事权利能力人
D．完全民事行为能力人