心电图纸上横向距离代表()心电图纸上纵向距离代表() ["时间","速度","振幅","电压","频率"]
体温38.1℃~39℃可归属()体温39.1℃~41℃可归属()体温超过37.0℃可归属() ["低热","高热","发热","超高热","中等度热"]
慢性牙周炎的临床特点为()。 ["发病年龄小","病程进展缓慢","菌斑牙石少","牙龈无炎症表现","早期表现为牙齿松动"]
侵袭性牙周炎的临床特点为()。 ["发病年龄都在35岁以上","严重及快速的牙槽骨破坏","通常牙龈炎症轻","病损局限,只累及磨牙","牙周袋浅,不超过4mm"]
某猪场采用人工授精配种,出现大群母猪屡配不孕,临床检查,猪群精神、饮食、体温、发情周期及阴道检查等均正常。如需进一步确诊,最必要的检查内容是() ["激素测定","相关传染病的检测","精液品质检查","肠道寄生虫检测","环境微生物检测"]
典型心绞痛()变异型心绞痛()