Thursday, April 20, 2023
问题:浮顶油罐的安全高度为浮船导向装置轨道上限以下3Om,拱顶罐安全高...
Sunday, September 11, 2022
问题:两轴对中不好或偏斜有补偿能力的连轴器是()连轴器。...
Saturday, September 10, 2022
问题:椭圆齿轮流量计是依靠齿轮轴传递的外力矩推动齿轮旋转而进行流量计的...
Sunday, September 11, 2022
Saturday, September 10, 2022
问题:已知试样温度为32℃,视密度为0.7350g/cm<sup>3<...
Sunday, September 11, 2022
Sunday, September 11, 2022
问题:电动阀若无指示灯时,开关阀应注意观察阀门丝杠运行情况。...
Sunday, September 11, 2022
问题:钟罩式气体流量标准装置,其工作压力一般小于1000OPa,测量的...
Saturday, September 10, 2022
Sunday, September 11, 2022
问题:NH3+HCl=NH4Cl属于()反应。A、置换B、分解C、化合D、复分解...
Monday, September 11, 2023
Thursday, September 15, 2022
Sunday, September 11, 2022
问题:为了避免热丝烧断或氧化,在热丝接通电源之前要先通入载气,工作完毕...
Sunday, September 11, 2022
问题:下列反应中,Zn的化合价由()。Zn+2HCl=ZnCl2+H2↑A、2→1B、0→2C、0→1D、1→2...
Sunday, January 1, 2023
问题:对长期停用且存有原油的罐,进行加热时,应采取从下向上的方式进行加热。...
Wednesday, April 26, 2023
问题:电力线始于正电荷,止于负电荷;磁力线也是与此类似,始于N极,止于S极。...
Wednesday, April 3, 2024
Wednesday, November 29, 2023
Sunday, September 11, 2022
问题:采用气动薄膜驱动的阀门,因为其行程和驱动力都较小,故主要用于()...
Sunday, September 11, 2022