New strains of viruses are transmitted to man by_____.
举一反三
- It can be inferred from the passage that all of the following are ways of producing new strains of influenza viruses EXCEPT _____.
- It can be inferred from the passage that all of the following are with of producing new strains of influenza viruses except ______ . A: two influenza viruses in the same animal recombining B: animal viruses recombining with human viruses C: two animal viruses recombining in one animal D: two animal viruses recombining in a human
- As influenza is caused by a variety of species and strains of viruses, in any given year some strains can die out while others create (1), while yet another strain can cause a (2).
- One of the most common sexually transmitted diseases that may lead to cervical carcinoma is caused by which of the following viruses? ____________
- Viruses can be transmitted by. A: Booting a PC from an infected mediu. B: executing an infected program. C: pirated software and shareware. D: All of the above.