TOEFL Listening: ETS-TOEFL听力机经 - 3A4SIVY9D2ZG73WUP$

Early brain research focused on neurons. What does the professor imply was the result of this emphasis? A. New method was found to treat injured brain cells. B. Little research was done on glial cells. C. Communication between glial cells and neurons was established. D. The definition of neurons was confirmed.