• 2022-06-07 问题

    Which of the following antibiotics is chiefly bactericidal? A: Tetracycline B: Erythromycin C: Penicillin D: Clindamycin

    Which of the following antibiotics is chiefly bactericidal? A: Tetracycline B: Erythromycin C: Penicillin D: Clindamycin

  • 2022-05-27 问题

    Which of the following are the three lines of defense against human infection A: Complete skin and mucous membrane B: Bactericidal substances and phagocytes in body fluids C: Antibodies and lymphocytes D: Antibiotics E: Vaccines

    Which of the following are the three lines of defense against human infection A: Complete skin and mucous membrane B: Bactericidal substances and phagocytes in body fluids C: Antibodies and lymphocytes D: Antibiotics E: Vaccines

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