直肠癌的首选影像学检查方法是() ["钡餐检查","钡灌肠造影","B超","CT","结肠镜"]
食管最常见的良性肿瘤是() ["脂肪瘤","血管瘤","平滑肌瘤","淋巴瘤","腺瘤"]
锅炉正常运行时主要参数有()。 ["A、锅筒压力、过热蒸汽压力;","B、过热蒸汽温度、再热蒸汽温度;","C、炉膛压力;","D、锅筒水位。"]
女,72岁,上腹不适,结合图像,最可能的诊断为() ["球部憩室","球部溃疡","降段憩室","降段占位","水平段憩室"]
中速磨煤机振动大主要原因有()。 ["A、煤量少;","B、磨煤机内有杂物;","C、地脚螺栓松动;","D、煤量太多。"]
病房误收了一位麻疹患儿。应采取什么措施制止麻疹的蔓延?