手术室的最佳温度是() ["A．20～22℃","B．22～23℃","C．24～25℃","D．26～27℃","E．28～29℃"] 安静状态下，单位重量产热最多的器官是() ["A．肌肉","B．皮肤","C．心脏","D．胃肠道","E．脑"] 机体自身御寒反应减慢体表降温速度最主要的原因是() ["A．肌肉产热增加","B．末梢血管收缩","C．热屏障增加","D．内分泌反应增强","E．内脏产热增加"] 一个新生儿，出生体重至2670g，身长51cm，面色红润，哭声响亮，一般情况良好。现采用母乳喂养方式。喂奶结束后，应竖抱婴儿，轻拍其背部的目的是() ["A．预防感染","B．增强食欲","C．镇静","D．促进断乳","E．防治溢乳"] 低温时，脑组织每下降1℃，脑血流量下降() ["A．3.7%","B．4.7%","C．5.7%","D．6.7%","E．7.7%"] 体温每降低1℃，耗氧量下降()