Dr. salk’s researchers found 100 different polio Strains. All of these strange could be grouped into how many types?

2read this passage from "the raven." what is puzzling the speaker in this stanza? 60% but the raven still beguiling my sad fancy into smiling, straight i wheeled a cushioned seat in front of bird, and bust and door then, upon the velvet sinking, i betook myself to linking fancy unto fancy, thinking what this ominous bird of yore- what this grim, ungainly, ghastly, gaunt and ominous bird of yore meant in croaking "nevermore." s and what the raven's message is why the raven came to visit where the raven came from how the raven got into his room

How is reading a social experience? (5 points)

Identify how chekhov’s background and beliefs may have influenced his short story “the bet”.