New reports say peace talks between the two countries have broken ____with no agreement ________.

A．down, reached

B．out ,reach

C．in ,reaches

D．up, reaching

左向右分流特点是最初的右心相和肺相正常，但当左心相出现时右心相重复显影，进而______持续显影，称为_________，简称脏污肺，同时主动脉影像较淡。