钾明矾,又称明矾,使用时不能过量,成人一天极量为() ["1","2","3","4"]
休克的诊断依据包括() ["有诱发休克的原因","意识异常,脉细速,尿量小于30ml/h","收缩压小于80mmHg","脉压小于20mmHg","原有高血压者收缩压下降30%以上"]
牛瘤胃穿刺的部位是()。 ["A、左肋部三角窝中央","B、右肋部三角窝中央","C、脐旁","D、胸口"]
鸡油一般用于菜肴制作的()。 ["底油","淋油","凉拌","炸制"]
可选择的气管导管包括() ["食管气管导管","喉罩气道","咽气管导管","鼻咽气道","口咽气道"]
什么叫自然选育?自然选育在工艺生产中的意义?