梁的截面尺寸为b×h=250mm×500mm,C30混凝土,受拉钢筋HRB335级,受压钢筋用 HPB235级,计算简图如题图所示,环境类别为一类。 若Gk=95kN,Qk=20kN,gk=2.600kN/m,qk=0.9kN/m,则梁的控制截面内力设计值为()kN·m。 A.229.7 B.250.6 C.284.0
汽车尾气中的一氧化碳与血液中的血红蛋白结合的速度比氧气快250倍。所以,即使有微量一氧化碳的吸入,也可能给人造成可怕的缺氧性伤害。轻者眩晕、头痛,重者脑细胞将受到永久性损伤;氮氧、氢氧化合物会使易感人群出现刺激反应,患上眼病、喉炎,尾气中氮氢化合物所含苯并芘是致癌物质,它是一种高散度的颗粒,可在空气...
英文名称:UreaUrea is available 29 times 来自 Szybio lambert labs,中文名称:尿毒症29,产品货号:SC28H250,1 R2:15毫升×1 | 82.40欧元N160 |尿素规格:R:40mlx4 | 114.32欧元1 |目录号SC28H250供应商Szybio Lambert价格尺
上海世博会太阳能光伏发电项目年发电量可达5×106kW•h,某学校共有250盏标有“220V 40W”字样的日光灯,上述发电量可供这些日光灯同时正常工作___h.
摘要: SCORPIO Tankers' aggressive deleveraging campaign could soon bring its net debt levels near its fleet scrap value, Jefferies says, at which point attention would shift "almost exclusively" to returning capital to shareholders. The New York-listed product tanker owner has been focused on reduci...
Iram Approved 10A 250V 3 Pin Argentina Zh-52 Plug Power Cord Match to PVC Flexible Cord H03VV-F 3× 0.5mm² -0.75mm² Power Cord, Find Details and Price about Power Cord Argentina Power Cord from Iram Approved...