利用Ф19mm水枪扑救燃烧区域为直径16m的建筑火灾,有效射程为15m,流量为6.5L/s,当供水强度为0.4L/s.m,水枪数量为几支。()
一支Ф19mm水枪,流量6.5L/s,供水强度为0.12L/s.m2时,其控制面积为多少m2。()
一液体在直径为20mm的管道中以0.5m/s的速度流动,则它的体积流量为0.157L/s。
某单层木材仓库着火,燃烧面积约240m2,火场上每辆消防车供应2支Φ19mm水枪,有效射程为15m(水枪流量为6.5L/s),灭火用水供给强度为0.2L/s•m2,则需要几辆火场供水战斗车。()
某商场发生火灾,燃烧面积为400m2,若火场灭火用供水强度为0.20L/S.m2,使用19mm水枪灭火有效射程为15m,火场灭火需用()支水枪。
Please arrange()a cleaning gang to sweep out all the ship’s cargo holds to enable her to receive cargo at this port.
Please()a cleaning gang to sweep out the hold.
A:What’s your()(名字),please?B:My name is Li Dawei.
某地下商场发生火灾,起火部位为营业室,燃烧面积约100㎡,有人员被困。消防队接到报警后立即赶赴现场。为控制火灾,指挥员安排使用19mm水枪,流量为6.5L/S,供给强度达到0.2L/s.m2时,需要()支水枪。
一支Ф19mm水枪,有效射程15m时的流量为6.5L/S,当火场灭火用水供给强度为0.2L/S•m2时,这支水枪能控制的燃烧面积是多少m2。()
某医院(α=1.5)共三层,其仅设伸顶通气的铸铁生活排水立管接纳了1个淋浴器(N=0.45,q=0.15L/s,B.=80%),1个大便器的排水(N=4.5,q=1.5L/s,B.=2%),则满足要求且最为经济的排水立管管径为()mm。
某单层木材仓库着火,燃烧面积约400m2,火场上每辆消防车供应3支Φ19mm水枪,有效射程为15m(水枪流量为6.5L/s),灭火用水供给强度为0.12L/s•m2,则需要几辆火场供水战斗车。()
To draw audience’s attention, a good speaker always shows _______ to/for his/her speech.
In “Ticket, Please”, What does Annie’s act on John’s back in a reversal of the traditional position suggest?
T o draw audience ’ s attention, a good speaker always shows _______ to/for his/her speech.
Please select a word to replace the underlined one.What they found out is so important that the university decided to make changes to its polices.
― _______________― It’s Ok. Please take a seat.
Please draw a mind map of the text we’ve learnd of Unit 1. Enjoy your team-work! 注意:思维导图正反两面各一张();表忘记伐木累合影哦!
一台泵出水量为1m3/h,合()升/秒.A.0.273L/SB.0.274L/SC.0.275L/SD.0.276L/S
某单层木材仓库着火,燃烧面积约240m2,火场上每辆消防车供应2支Φ19mm水枪,有效射程为15m(水枪流量为6.5L/s),灭火用水供给强度为0.2L/s·m2,则需要几辆火场供水战斗车。
How do you replicate a delivery free of charge in R/3’s Materials Management? Please choose the correct answer.()
有甲乙两根输水管,甲管直径d=0.2m,当量粗糙度△=0.86mm,流量为0.94L/s,乙管直径d=0.04m,当量粗糙度△=0.19mm,流量为3.5L/s,水温均为15℃,试判断甲乙两管那根是水力光滑管?
Listen to the news item again and answer the following questions. Then give a brief summary of the news item. What is the goal of the G20 meeting What has the IMF done to its forecast for global economic growth What is the best way for China to get out of the downward pressure What has the governor of China’s central bank hinted in terms of tackling the economic problem Please give a brief summary of the news item. ()
一液体在直径为20mm的管道中以0.5m/s的速度流动,则它的体积流量为0.157L/s。()