Viruses usually have two phases to their execution, the infection phase and the(75)phase. The later phase is optional, since stone viruses simply reproduce.A．reproduceB．proliferationC．defendD．attack
Viruses usually have two phases to their execution, the infection phase and the(75)phase. The later phase is optional, since stone viruses simply reproduce.
A．reproduce
B．proliferation
C．defend
D．attack
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