牙齿的发育中恒牙共有() ["A.20颗","32颗","22颗","16颗","24颗"]
为了全面完整地反映我国区划情况,以满足统计工作的需要,国家统计局规定了村级区域的编码规则,用统计用区划代码的10~12位表示()。 ["A.省(自治区、直辖市)","B.县(区、市、旗)","C.乡、镇(街道办事处)","D.居委会、村委会"]
Rh血型抗原从未发现过的是() ["D抗原","d抗原","E抗原","e抗原","C抗原"]
患者,男性,60岁,右下腹痛3个月,有时腹泻,大便隐血试验阳性。钡剂灌肠检查显示升结肠中段一不规则形充盈缺损,局部管壁僵硬,结肠袋消失。若进一步进行下腹部CT检查,主要价值为() ["A.可以明确诊断","显示结肠狭窄程度","显示肠壁功能变化","显示病变向周围组织侵犯情况","显示结肠黏膜破坏情况"]
牙齿的发育中乳牙共有() ["A.20颗","12颗","22颗","16颗","24颗"]
试述脑脓肿的预后取决于哪些因素。