女,43岁,右下腹持续性疼痛5天,伴恶心、呕吐,呕出物为胃内容物。体温38.5℃。体检发现右下腹5cm×5.5cm大小肿块,触痛明显。如果急诊手术,最合适的手术方式是() ["脓肿引流","切除肿块","常规切除阑尾","右半结肠切除","一期肠吻合"]
运行中的给水泵发生汽化时有何现象?
发动西安事变的爱国将领有() ["冯玉祥","吉鸿昌","张学良","杨虎城"]
为何不允许离心式水泵倒转?
大脑皮层处于紧张活动时脑电活动主要表现为() ["α波","β波","δ波","棘波","θ波"]
扩底成孔工艺的影响因素有哪些?