【简答题】A.Rescuers had saved 32 whales this time. B.50 whales died after becoming stranded last week. C.70 whale stranding incidents have happened since 1900. D.None of these incidents' involves more than 200...
【简答题】A. direct contact with infected blood B. from 2 to 15 or more years after becoming infected C. without symptoms D. acquired immuno-deficiency syndrome E. live in the same room with an HIV-infected roo...