Effect of Participants′ Contact Information on Cohort Retention among Injection Drug Users;

The circuit design of data retention during power-down based on MAX6361;

A Clinical Study and Application in Individualized Retention of Fixed and Removable Retainers;

Maintenance approachs of complete male sterility in Brassica napus L.;

Establishment and maintenance of longan embryogenic cell lines;

The fostering,gestation and maintenance of sensitivity are a crucial task of editors in charge in their long work practice.

The complete preservation of quantum entanglement information under detuning;

Some conditions of the structural property preservation by synchronization composition of Petri nets are obtained.

This paper demonstrates the inevitability and necessity of preservation or reform to the national custom habits in the period of construction of socialism modernization.

The Historical Development of the Requirements of the Communist Party of China to maintain Her Members Advanced Nature;

To maintain CPC member s progressiveness,it is necessary to correctly deal with the relationship between progressiveness and fast development,to correctly understand the scientific method for fast development,and to attentively focus on the educational activity about progressiveness.

How to Understand and Keep the Advantages of Communist Youth League in College in the New Period;

Discussed the problem that appears in progress of keep advancement of party and characters we should be have.

Summing up the experiences and lessons of the relationship between CPC and the masses since the founding of CPC is instructive to maintain and develop this relationship and keep the progressiveness of CPC.