For the effects of physical factors on viruses，which of the following description is incorrect?
选项：

A:most viruses are resistant to cold and sensitive to heat ;
B:most viruses are inactivated at 50-60℃ for 30 minutes ;
C: most viruses are stable in the pH 5-9 ;
D:different viruses have different pH tolerance ;
E:ultraviolet light can inactivate the virus by inhibiting its nucleic acid replication, so it can be used to prepare inactivated virus vaccine.