门禁系统管理软件可以实现门禁系统的大部分管理功能,但配置系统的控制器、读卡器的操作只能在门禁控制器上完成。
参考答案:错
根据句意及首字母提示填空。
1. Many students' favorite subject is s_____.
2. W_____ is the fourth day of a week.
3. Please give me an e_____; I am not clear about the problem.
4. Are your teachers s_____ with you m your lessons?
5. I'm s_____ you will do better in your lessons this term.
对电动机从基本频率向下的变频调速属于()调速。
A、恒功率
B、恒转矩
C、恒磁通
D、恒转差率