以下关于骨髓的描述正确的是() ["全部位于长骨的骨髓腔内","黄骨髓有造血功能","胎儿和幼儿无黄骨髓只有红骨髓","黄骨髓主要成分为水","红骨髓不会转变为黄骨髓"]
关于霍乱的病理改变叙述不正确的是() ["胆囊内胆汁黏稠浑浊","肾脏肿大","心、肝、脾均缩小","皮肤干燥","肠黏膜明显炎症及溃疡,肠内充满米泔水样液体"]
什么是看跌期权?
患者女,68岁。头痛,头晕,胸闷。查体:BP200/110mmHg,无意识障碍及肢体活动障碍。该患者最可能的诊断为() ["脑出血","高血压","脑炎","冠心病","心肌病"]
对恙虫病的病原治疗无效的药物是() ["青霉素","红霉素","氯霉素","四环素","多西环素"]
能见度在30米左右时,车速不得超过()公里/小时