上前牙金-瓷桥桥体的龈底形态最好选用() ["船底式","鞍基式","悬空式",""T"型接触式","单侧接触式"]
关于用力肺活量,下列叙述错误的是() ["1s用力呼气容积即FEV最有意义","FEV1百分比分别为93%","FEV2百分比96%","FEV3百分比99%","阻塞性通气障碍时呼出时间延长"]
患者男性,24岁。右肾上腺肿瘤。查体一般情况好,心率110次/分、律齐,血压160/100mmHg,两肺听诊清晰,其他检查均正常,择期在硬膜外麻醉下行肿瘤切除。术中探查肿瘤时出现呼吸困难应考虑() ["神经损伤","胸膜损伤引起的气胸","麻醉平面过高","血压下降","辅助药物的作用"]
下列()是磨煤机堵塞的象征。 ["A、磨进出口压差增大;","B、磨出口温度下降;","C、汽压、汽温上升;","D、磨煤机两端有煤粉冒出。"]
有关急性血源性骨髓炎的病因病理描述,哪项是错误的() ["骨质破坏,坏死与新骨形成互相平行","早期以破坏、坏死为主","全身情况差是诱因之一","儿童干骺端血供丰富,不易发病","死骨形成是髓腔血供和骨膜下血供双重缺血所致"]
亚急性期血肿。