【多选题】轿厢平层精度的维保要点描述正确的是
A.
电梯正常运行,检查轿厢停靠在层站后,平层准确度是否在±5mm范围内。
B.
电梯正常运行,检查轿厢停靠在层站后,平层准确度是否在±15mm范围内。
C.
检查平层保持精度应为±20mm,如果装卸载时超出±20mm,应校正到±10mm以内。
D.
检查平层保持精度应为±20mm,如果装卸载时超出±20mm,应校正到±20mm以内。
【单选题】某孕妇,第1胎,妊娠39周来院检查,医生告之临产先兆,收住院。最可靠的依据是
【判断题】管理三项约束主要是资源和质量之间的平衡。 Managing the triple constraint primarily involves making trade-offs between resources and quality.
【单选题】The writer had been a diver for Olympic games for __________.
【单选题】液压电梯的平层精确度应在( )的范围以内。
【判断题】管理三项约束主要是资源和质量之间的平衡。(140703班陈甜盼译) Managing the triple constraint primarily involves making trade-offs between resources and quality.
【判断题】转向管柱式EPS的助力电机位于方向盘下方,减速机构(常见为蜗轮蜗杆传动)与转向轴相连来实现变速与转向。
【单选题】液压电梯的平层精确度应在( )的范围内。
【判断题】The writer had been out of job for a long time before she went back to community college again.