下面哪种固定液需要现用现配，并且需在暗处固定？（）

A.甲醛-钙液

B.PLP液和PLPD液

C.Orth液

D.Müller液

E.Zenker液

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 (96) . It determines how the various results are computed by the product and presents this information in the form of a (97) and associated scenarios. The second is (98) , which determines the classes and their attributes, then determines the interrelationships and interaction among the classes. The last step is (99) , which determines the actions performed by or to each class or subclass and presents this information in the form of (100)

A．use-case modeling

B．class modeling

C．dynamic modeling

D．behavioral modeling