单选:在达西公式hf=[λ(L/D)](v2/2g)中,"D"表示的是()。 题目分类:安全生产法及相关法律知识 题目类型:单选 查看权限:VIP 题目内容: 在达西公式hf=[λ(L/D)](v2/2g)中,"D"表示的是()。A.管道长度B.水力半径C.沿程阻力系数D.管道直径 参考答案:
James got lost in the city,__________ he had to ask for help. James got lost in the city,__________ he had to ask for help. 分类:安全生产法及相关法律知识 题型:单选 查看答案
James got lost in the city, __________ he had to ask for help. James got lost in the city, __________ he had to ask for help. 分类:安全生产法及相关法律知识 题型:单选 查看答案
女性,40岁。既往有风湿性心脏病史,近一周出现咳嗽、咯痰,双下肢浮肿,不能平卧。该患者还可能出现下列哪项体征( ) 女性,40岁。既往有风湿性心脏病史,近一周出现咳嗽、咯痰,双下肢浮肿,不能平卧。该患者还可能出现下列哪项体征( ) A.呼吸过缓B.深大呼吸C.潮式呼吸D.呼吸过速E.叹息样呼吸 分类:安全生产法及相关法律知识 题型:单选 查看答案