In this paper,the basic thinking and basic principles of quantum teleportation brought up by Bennett et al are reviewed at first,and then one of the basilic steps in quantum teleportation—preparation of the entangled state is introduced in detail,and some of its experimental realization schemes which are representative traditionally and recently are described.

The lack of judicial authority and its establishment from present situation of civil special procedure;

The present situation of greening teaching of middle school chemistry experiments of Chaozhou city was investigated.

In such a lienation,the access and usufruct of public assets are privately distributed ac cording to classes of power,which forms the actual state.

With the questionnaire designed by ourselves,we ve conducted an in v estigation into the current situation of implementation of new curriculum in the junior high schools,which shows that great changes have taken place in the man aging pattern and teachers teaching behavior,style and views since the impleme ntation of new curriculum,but some problems still exist.