Classification and usage skills of antibiotics antibacterial drugs   1.1 Classification according to the antibacterial spectrum and application of drugs   1. The main antibacterial drugs against Gram-positive bacteria include: penicillins, cepha…

International Women's Day Celebrating pioneering women in STEM across time. 5:04 Now playing The genius of Marie Curie - Shohini Ghose TED-Ed 2.5M views3 years ago Subtitles 3:39 Now playing How These Women Changed Science …