上游充通大 SHANGHAI JIAO TONG UNIVERSITY I.VIRUS AND VIRON 9.1 General Properties of Viruses 9.2 Nature of the virion Chen Feng,Shanghai Jiao Tong UniversityChen Feng, Shanghai Jiao Tong University I. VIRUS AND VIRION 9.1 General Properties of Viruses 9.2 Nature of the virion