外周血反映骨髓幼红细胞增生程度的最可靠指标是() ["血红蛋白及红细胞计数","网织红细胞百分率","网织红细胞绝对值","出现有核红细胞","红细胞内出现Howell-Jolly小体"]
调车信号继电器DXJ是受()线控制。 ["A、8","B、8线和11","C、10","D、11"]
关井后立压与套压之间的差值能够反映的是()。 ["A、环空受污染程度","B、管柱内受污染的程度","C、整个井眼内受污染的程度"]
血清阴性脊柱关节病包括() ["强直性脊柱炎","反应性关节炎","类风湿关节炎","银屑病关节炎","骨关节炎"]
餐桌花摆花高度一般在()。 ["20cm","30cm","40cm","10cm"]
销连接在机械中有()三大作用。