A:y>0
B:y<0
C:y<-2
D:2<y<0
医生在给人体抽血化验时,用一根橡皮胶管将上肢的上臂扎紧,一会儿上肢前臂靠肘关节处的血管暴起,该血管是( )
______ we guess, the man wearing dark-glasses is a detective for this murder case.