Smallpox can be effectively prevented by _______.
A: vaccines
B: penicillin
C: antibiotics
D: vitamines
A: vaccines
B: penicillin
C: antibiotics
D: vitamines
举一反三
- 中国大学MOOC: Smallpox can be effectively prevented by _______.
- Today, smallpox, polio, typhoid and measles are no longer common because most people have been protected from them by _______. A: anti-neurohomone drugs B: antiviral drugs C: vaccines D: antibiotics
- 【单选题】(3分) Penicillin is a group of antibiotics which include ________, Penicillin V, procaine penicillin and benzathine penicillin. A. Penicillin D B. Penicillin G C. Penicillin F D. Penicillin E
- Which of the following antibiotics is chiefly bactericidal? A: Tetracycline B: Erythromycin C: Penicillin D: Clindamycin
- The main purpose of the text is to_____________. A: convince the reader that vaccines are not as safe as many think B: educate the reader on how vaccines are used and some of their dangers C: educate the reader on the circumstances that would necessitates widespread vaccinations D: present the method by which vaccines are used through the case of the smallpox vaccine