题目

  A qualified(有资格的) doctor rarely practised but instead devoted his life to writing, once saying,“Medicine is my lawful wife, and literature is my lover.” Russian writer Anton Pavlovich Chekhov(契诃夫), was a great playwright(剧作家) and one of the masters of the modern short story.   When Chekhov entered the Moscow University Medical School in 1879, he started to publish hundreds of comic short stories to support his family. After he graduated, he wrote regularly for a local daily newspaper.   As a writer he was extremely fast, often producing a short story in an ho(2)已知集合M={-1,1}，N={x|＜2x+1＜4，x∈Z}，则M∩N=A. {-1,0}                  B. (-1)                 C. {0}              D. {-1,0}