题型:单项选择题 某地区每小时最大降雨量H=150mm/h,现设计一栋楼房,屋面水平集水面积为1000m2,现选用管径为10cm的落水管,则至少需要设置落水管( )根。A.4B.5C.6D.7 查看答案
题型:单项选择题 A3/A4型题 男性,45岁。反复上腹部疼痛、腹胀4年。既往有急性胰腺炎病史。查体:腹平,中上腹轻压痛,肝脾未及。实验室检查:WBC5.9×109/L,N68%。超声检查:胰腺轻度增大,轮廓不清,边界欠清,内部回声增强,呈条带状强回声。在鉴别诊断中,支持该患者诊断的声像图表现是()A.胰管内可见结石样回声B.胰腺边界不规则,与周围组织分界不清C.可以合并假性囊肿D.胰管呈不均匀"串珠状"扩张E.以上都是 查看答案
题型:单项选择题 At the required fire drill conducted aboard a vessel,all persons must report to their stations and demonstrate their ability to perform the duties assigned to them().A.by the toolpusherB.in the station billC.by the person conducting the drillD.at the previous safety meeting 查看答案