某患者X线片显示46残根根尖下方有一直径约0.3cm圆形低密度影像,周围无明显骨白线包绕。该病最可能的诊断是() ["含牙囊肿","成釉细胞瘤","根尖周囊肿","根尖肉芽肿","颌骨血管瘤"]
下列病理改变是溃疡性结肠炎所特有的是() ["黏膜糜烂","黏膜溃疡","隐窝脓肿","腺上皮增生","以上都不是"]
上消化道大出血的临床表现中,呕血还是便血主要取决于() ["出血部位的高低","血液在胃肠内的停滞时间","肠蠕动的快慢","出血速度和量","凝血功能情况"]
关于斑块哪一项是错误的() ["局限性隆起的皮疹","皮疹的直径大于1cm","斑块多由丘疹融合而成","斑块可由斑片扩大而成","斑块常见于银屑病"]
CT成像的优点除外() ["图像清晰","不用造影剂增强即能显示肌、血管以及肿瘤的浸润范围","可区分肿瘤的良恶性","层面连续,对骨组织病变显示好","定位准确"]
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