найти залог глаголов сказуемых и время 1. Probably the bacteria are made up of various kinds of organisms, some are related to algae, others to fungi. Future research will doubtless throw more light on such relationship.
2. Before the middle of the nineteenth century, the word «virus» was commonly applied to all toxic or poisonous substances, including snake venom.
3. Viruses are distinguished from poisons and venoms because of their infectious quality.
4. In addition to smallpox and yellow fever, viruses cause such human diseases as mumps, measles, poliomyelitis, chicken pox, Japanese В encephalitis, infectious hepatitis, influenza and probably the common cold.

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