【正文】
ot encrypted, are called ________.A、plaintextB、ciphertextC、hypertextD、contextMany viruses go resident in the memory like a ( ).A、.exe fileB、. fileC、tsr programD、data fileViruses all have two phases to their execution, the ( ) and the ( ).A、infection phaseB、del_ete phaseC、attack phaseD、create phaseMany viruses do harmful things such as ( ).A、deleting filesB、simulating