推荐回答（1个）
我觉得你可以考虑一下在考试的时候用“大象找答案”小程序去搜答案呀，考试也不怕挂科啦，直接搜就ok啦
【多选题】电机安装完毕后在试车时，若发现振动超过规定值的数值，应从哪些去找原因（ABCD）
A.转子平衡块松动
B.转轴弯曲变形
C.底装螺钉松动
D.安装地基不平或不坚实
【多选题】电机运转时，轴承温度过高，应从哪些方面找原因（ABCD）
A.润滑酯牌号不合适
B.轴承室中润滑脂过多或过少
C.转动部分与静止部分相擦
D.皮带拉得太紧
【多选题】在异步电动机运行维护工作中应注意些什么（ABCD）
A.电动机周围应保持清洁
B.定期检查电动机的温升
C.监听轴承有无异常杂音
D.注意电动机音响、气味、振动情况及传动装置情况
【多选题】正弦波发生电路由（ABCD）构成。
A.放大电路B.正反馈网路C.选频网路D.稳幅电路
【多选题】微机的软件系统包括（ABCD）
A.操作系统B.各种语言的编译程序C.应用软件D.工具软件
【多选题】微型计算机的硬件系统组成部分是（ABCD）
A.运算器B.控制器C.存储器D.输入设备和输出设备
【多选题】微机技术指标主要有（ABCD）
A. CPU型号B.时钟主频C.内存容量D.硬磁盘容量
【多选题】最小的计算机系统应该具有(ABD)三个装置才能完成计算功能。
A.运算器B.存储器C.编辑器D.控制器
【多选题】光敏电阻式自动变 光器的组成(BCD)。
A.压敏电阻B.光敏电阻C.电子电路D.继电器
【多选题】 A/D转换器的主要参数是（AB）
A.分频率3.转换速率C.角频率D.加速度
【多选题】单管MOS传输门模拟开关的两个特性是(BD)。
A.截止和导通时态
B.控制端与信号通路是绝缘的
C.转换器的频率
D.当器件接通是，源，漏极之间无直漂移
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