用固相含量仪测得的海水加重泥浆的固相体积是()含量。 ["般土和钻屑;","钻屑和重晶石;","般土、重晶石和盐;","般土、重晶石、盐和钻屑。"]
B6065牛头刨床最大刨削长度是:()。 ["600mm","630mm","650mm","670Mm"]
跑道转弯灯的电门置于打开位,那么跑道转弯灯什么时候亮() ["起落架收起的时候","一直亮","起落架放出的时候","与起落架无关"]
CA6140型卧式车床最大车削工件回转直径为:()。 ["200mm","210mm","220mm","230mm"]
在紧急电源构型下,哪些驾驶舱灯光保持照明() ["左边主仪表面板照明,左边顶灯(DOME.照明","右边主仪表面板照明,右边顶灯(DOME.照明","右边主仪表面板照明,左边顶灯(DOME.照明","左边主仪表面板照明,右边顶灯(DOME.照明"]
何谓战机的必然性?