大站调压屏当室外电网反相或(),调压电机工作时会出现反转现象。
参考答案:缺相(少一相)
某人下午6点多外出时,看手表上两指针的夹角为110°,下午7点前回家时发现两指针夹角仍是110°,他外出的时间是______分钟.
Yesterday I met a(n) _____ teacher by chance who taught me English in the university three years ago.
A.early
B.former
C.first
D.advanced