1, through "correspondence" reasoning, because SAP and SIP constitute a poor relationship, that is, if SAP is true, SIP must be true and SIP can be introduced by SAP;
2. Through continuous transposition, the first step is to transpose SAP to P is, and the second step is to transpose PIS to SIP, thus obtaining the certificate.
Chapter 1 Office Building Aerobics
Office work is fast-paced, and exercise should be easy to learn a