Base on C/S and B/S,this paper discusses the model,techniques,and properties of MIS development in the design and realization of the tax affairs levy the management system,specially when software requirements have great change,it discusses system principle of MIS and techniques of data acquirement.
Finally, a flexible optimal tax policy which can be internally adjusted to a certain extent is derived, and it is found that the distribution of factor income plays an important role in designing the optimal tax policy.
The optimal tax policy is analyzed, and the optimal pollution is derived.
The review considers the molecular biological organization of genome region pX of the human T-cell leukemia virus type I (HTLV-I) along with the structure and functions of regulatory proteins Tax, Rex, and poorly studied Rof and Tof.
Tax functions are described, including transcriptional trans-activation, trans-repression, and effects on apoptosis and the cell cycle.
The roles of Tax and Rex in controlling gene expression and replication of HTLV-I are discussed.