釉柱晶体的宽约釉柱晶体的厚约釉柱晶体的长度约 ["100~140nm","40~90nm","5~15nm","20~30nm","160~1000nm"]
关于吸入高浓度氧对脑的影响,下列哪项正确() ["A.脑压增高","B.脑血管扩张","C.脑淤血","D.脑水肿","E.脑血管收缩"]
正常人进行深呼吸而使每分通气量增加2倍时,机体将发生什么变化() ["A.肺泡通气量也必定增加2倍","B.肺泡氧气分压增加2倍","C.动脉血氧饱和度将增加2倍","D.动脉血氧饱和度将增加10%","E.每分钟肺泡通气量增加不到2倍"]
剖宫产手术前患者出现低血压时,应使患者卧向() ["A.右侧","B.左侧","C.头高脚低","D.头低脚高","E.以上都不是"]
胃大部切除手术术前皮肤准备的范围是() ["A.上起乳头连线,下至耻骨联合,两侧至腋后线","B.上起锁骨连线,下至耻骨联合,两侧至腋后线","C.上起乳头连线,下至大腿上1/3,两侧至腋中线","D.上起剑突水平,下至大腿上1/3,两侧至腋后线","E.上起乳头水平,下至耻骨联合,两侧至腋中线"]
家族性巨颌症可出现嗜酸性肉芽肿可出现汉-许-克病可出现勒-雪病可出现骨纤维异常增生症可出现