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A.A.三个月 B.B.半年 C.C.一年 D.D.二年 [单项选择]当相变介质加热至沸腾状态,打开加热炉顶部的排气阀、对炉内进行卸压()min后再关闭阀门。
A. 1~5 B. 5~15 C. 15~20 D. 20~30 [判断题]按照GB/T19073-2018《风力发电机组齿轮箱设计要求》规定:双列轴承是指有双列滚动体的滚动轴承。
A.正确 B.错误 [单项选择]( )的完成代表着项目周期的一个里程碑,标志着项目从执行转向运营阶段。
A. 项目竣工验收 B. 项目后评价 C. 项目完工报告 D. 工项目运营准备 [判断题]可靠性统计状态改变的时间要以运行日志记录为准正确
A.正确 B.错误 [简答题]细胞生物学的任务是什么?它的范围都包括哪些?
[多选题]变压器空载试验目的是( )。
A.确定电压比 B.判断铁芯质量 C.测量励磁电流 D.确定线圈有无匝间短路故障 E.测量空载损耗 [单选题]以()为标志,我国开启了改革开放的历史征程。
A.党的十一届三中全会 B.党的十二届三中全会 C.党的十一届五中全会 D.党的十一届六中全会 [单项选择]根据( )定律,美国实际产出每下降2个百分点,实际失业率将增加1个百分点。
A. APl B. 奥肯 C. 林达 D. AKl [单项选择]某研究获得一组病人的存活时间为79、133、185、475、133、238,对此资料进行生存率估计,可采用()
A. 秩和检验 B. 寿命表法 C. 方差分析 D. 乘积极限法 E. 1og-rank检验 [填空题]接站内停车的电力机车及其牵引的列车时,计算机联锁的车站,须在计算机显示器( )接车股道车次前,输入( )或( )字样( )。( )
[判断题]票卡发售模块的摩卡轮可以更换。
A.正确 B.错误 [单选题] 开关柜检修时分闸保证( )额定电压可靠动作,小于 30%额定电压应不动作。
A.80%-110% B.65%-120% C.80%-85% D.100%-120%。 我来回答: 提交
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