Penicillin antibiotics were among the first medications to be effective against many bacterial infections caused by staphylococci and streptococci.
Right
举一反三
- 【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
- Many accidents ______ by careless drivers last year. A: are caused B: were caused C: was caused D: caused
- Many accidents____ by careless drivers last year. A: are caused B: were caused C: have caused D: will cause
- Bicycle-sharing is popular among many Chinese people as they provide an effective solution to all the problems.
- Smallpox can be effectively prevented by _______. A: vaccines B: penicillin C: antibiotics D: vitamines
内容
- 0
The structures of many proteins—and their constituent domains—are so stable and effective that they have been conserved throughout evolution among many diverse organisms.
- 1
It is reported that many cases of sickness were caused by (eat) _________ during the Spring Festival this year.
- 2
Which of the following antibiotics is chiefly bactericidal? A: Tetracycline B: Erythromycin C: Penicillin D: Clindamycin
- 3
Many of our actions are not caused by any___forces, but are instead products of the environment we were raised in.
- 4
The most common cause of a cold is: A: Bacterial infections B: Too tired C: Catch cold D: Virus infection