桥梁预制过程中,当昼夜平均气温或最低气温分别低于下列哪组温度时,应按冬季施工处理?() ["A、5℃,-3℃","B、5℃,0℃","C、3℃,0℃","D、3℃,-5℃"]
下列哪种因素与诱发反流性食管炎无关() ["吗啡","酒精","吸烟","肥胖","胃内压降低"]
神经型食物中毒的特点为() ["患者不是传染源","通过进食被肉毒杆菌污染的食物而传播","外毒素有高度致病力","病后不产生免疫力","婴儿病死率高"]
血管内溶血的常用主要诊断依据是() ["网织红细胞的百分比及绝对值均增高","高(非结合)胆红素血症","血红蛋白尿及含铁血黄素尿","红细胞寿命缩短","尿隐血阳性"]
下列胃肠激素,哪一种可促进胃排空() ["促胃液素","生长抑素","促胰液素","抑胃肽","胰高血糖素"]
新一代雷达系统对灾害天气有强的监测和预警能力。对雹云、中气旋等小尺度强对流现象的有效监测和识别距离应大于()。