再就业培训过程中用人单位负责培训学员（）落实。
A、用餐
B、实作设施、设备
C、培训时间
D、着装
参考答案：B, C
Some of the students are afraid of the teachers _____ strict with them.
A．who is
B．who are
C．that is
D．that have
三相五线制系统与三相四线制系统相比，有哪些优点？用在什么场合？
