单项选择题
单项选择题 肾动脉狭窄的超声诊断标准()。①狭窄处血流亮度增加,流速加快,Vmax≥180cm/s②重度狭窄处血流亮度减低,流速减慢③Vmax狭窄处/Vmax邻近的腹主动脉≥3.5④Vmax腹主动脉/Vmax狭窄处≥3.5⑤AT≥0.07s,AC2,RI3.0m/s2,RI>0.5 A. ①②③⑤B. ①③⑤C. ①②④⑥D. ①④⑥
单项选择题 __________ embellish the whole of Beowulf. For example the sea is often “swan’sway” or “whale-path”; a soldier is often a “ shield-hololder or battle-hero” , etc.
单项选择题 公安机关消防机构办案人员对个人作出()行政处罚,可以当场作出行政处罚决定