【单选题】能够直接启动 的三相笼型异步电动机的容量范围通常为 ( )。
【单选题】合格的维修单位必须具有完整的维修记录,下列维修记录应当至少保存30天的是
【简答题】学生管理系统XSCJ包含学生基本情况表(XS)、课程信息表(KC)和成绩表(XS_KC),各表结构如下。 表结构参考群聊中发的图片 写出完成以下操作的SQL命令: 创建学生管理系统数据库XSCJ。 在数据库XSCJ中创建学生基本情况表XS。 在数据库XSCJ中创建课程表KC 在数据库XSCJ中创建成绩表XS_KC。
【判断题】3. 报告不能用“特此报告”之类的结束语。 (
)
【单选题】In the circuit, given that , ,the real directions of voltage and current are:
A.
point a has the higher potential, current is flowing from a to b
B.
point a has the higher potential, current is flowing from b to a
C.
point b has the higher potential, current is flowing from a to b
D.
point b has the higher potential, current is flowing from b to a
【多选题】公共部门人力资源管理的主要特征有哪些( )。
【单选题】In the circuit, given that , the real direction of voltage and current is:
A.
point a has the higher potential, current flowing from a to b
B.
point a has the higher potential, current flowing from b to a
C.
point b has the higher potential, current flowing from a to b
D.
point b has the higher potential, current flowing from b to a