简述动态模型的特征，说明事件、事件跟踪图、状态、状态图的含义。

5．He first welcomed the new student and then explained college regulations. (go on)

Ronald Musoke is a student at ______ in California.

A．Uganda College

B．College of Marin

C．Mills College

D．Mudd College

He first welcomed the new student and then explained college regulations. (go on)

The beautiful girl is a college student, ______ is clear from her manner．

A．what B．as C．that D．such

college and the average strident who does not, are so______ to the college going student that any student who can reach college owes it to himself to do so.

A．preferable

B．favourable

C．convenient

D．compulsory

Largely due to the university tradition, every college student here works ______ .

A．industrially

B．industriously

C．consciously

D．purposefully

The college student hasdecided to devote (her)_____ to helping disabled persons

The money spent on a college student ______ up to about 7,000-8,000 Yuan a year.

A．pays

B．costs

C．adds

D．uses

he class.

A.Undoubtedly

B.Fortunately

C.Nevertheless

D.In spite