题目选项分析

Virologists, having learned an enormous amount during the last two decades about HIV/AIDS and its devolution from a fatal to manageable disease, are now learning more details about how the virus changes and how patients transmit the disease.

Virologists, having learned an enormous amount during the last two decades about HIV/AIDS and its devolution from a fatal to manageable disease, are now learning more details about how the virus changes and how patients transmit the disease.