某面粉碾磨厂房，地上2层，耐火等级二级，东临一座地上4层商店，其防火间距不应小于（ ）。
参考答案
参考解析
【单选题】
竞争性拮抗药（ ）。
亲和力及内在活性都强
与亲和力和内在活性无关
具有一定亲和力但内在活性弱
有亲和力、无内在活性，与受体不可逆性结合
有亲和力、无内在活性，与激动药竞争相同受体
【单选题】
Ryan Hooper
remarks that significant moves may pose challenges to children.
says that it is wise to leave kids in the dark about real estate decisions.
advises that home purchases should not be based only on children’s opinions.
thinks that children should be given a sense of involvement in homebuying decisions.
notes that aspects like children’s friends and social activities should be considered upon homebuying.
believes that homebuying decisions should be based on children’s needs rather than their opinions.
assumes that many children’s views on real estate are influenced by the media.
【A2型选择题】
患者，男，60岁。心前区阵发性疼痛1个月，多在夜间发作。与活动无关。每次发作15分钟，发作时心电图Ⅱ、Ⅲ、aVF导联ST段抬高。首选治疗的药物是( )
硝酸酯类
β受体阻滞剂
钙离子拮抗剂
洋地黄类
乙胺碘呋酮
