高原居民对缺氧的代偿主要是通过() ["心跳加快","肺血管收缩","呼吸增强","组织利用氧能力增强","血红蛋白氧离曲线右移"]
心室复极的方向是()。 ["心内膜向心外膜方向推进","心内膜与心外膜同步复极","心外膜向心内膜方向推进","室间隔向心室内膜推进","右心室向左心室方向推进"]
下列肿瘤中,对放疗较敏感者有() ["鳞状细胞癌","基底细胞癌","恶性黑色素瘤","骨肉瘤","胚胎性横纹肌肉瘤"]
口腔颌面部常见的癌前状态有() ["A.口腔黏膜白斑","B.口腔黏膜红斑","C.口腔扁平苔藓","D.盘状红斑狼疮","E.上皮过角化"]
心室除极首先从()。 ["左室开始","右室开始","室间隔中部开始","室间隔上部开始","基底部开始"]
第11胸椎棘突下旁开1.5寸的腧穴是()。第9胸椎棘突下旁开1.5寸的腧穴是()。