To study the causes of disappearance o.

The weaknesses were related to the changing society,their class consciousness and value orientation,which finally led to the disappearance of such novels.

Such extinction may be due to that the referents or concepts have faded away, or given way to new names.

A large number of poly-voice-part songs exist in our country, but these precious national bequests now face the danger of extinction.

Then it walked up to decline and extinction.

In this paper,several reasons which make the brooks and small lakes wither away and harmfulness are set forth to remind the whole society paying attention to the problem and getting along with the natural world in perfect harmony,and avoid unnecessary calamities.

Some people say that the literature would wither away.

Marx s theory that commodity relations should be wither away in public ownership system is a scientific foresight.

How does the newspaper deal with the challenge of the Internet? Will newspaper be displaced by Internet and disappear at last? By discussing the advantages of the newspaper and the measures it takes, the author draw the conclusion that newspaper will exist for a long period of time.

The detective story has various characters which disappeared or per- ished in the 1950-1970.

Blindly pursuing computer technology and the Internet, some people lose their scientific and sensible analysis and have the idea that "traditional libraries will disappear in the 21st century".

The changes of the environment and relative environmental catastrophe are important reasons of Loulan s perish.

The thesis consentrates on finding the thought source of Barthes author perishment opinion and its developing clues lenthway and comparing with the other parties of literary criticism so that a clear structure of his theory can be learnt.