Заполните пропуски глаголом "to have" или "to be" в соответствующем времени. 1. A contaminated object ... one that contains bacteria. 2. Bacteria ... found in various parts the body. 3. The presence of bacteria does not mean ne...

Заполните пропуски глаголом "to have" или "to be" в соответствующем времени. 1. A contaminated object ... one that contains bacteria. 2. Bacteria ... found in various parts the body. 3. The presence of bacteria does not mean necessarily that a disease process ... been established. 4. A strain that ... reduced virulence is said to be attenuated. 5. Man and animals ... several defense mechanisms for destroying invading bacteria.