自用变压器低压侧熔断器熔断有哪些原因?
参考答案:
(1)380v母线及其引出线路接地或短路
(2)负荷线路的熔断器选择不当,不先熔断
(3)熔断器接触不良或性能不好
— How do you find the football match between England and Italy?
— There is nothing special-it is only________.[ ]
A. average
B. usual
C. typical
D. normal
肱骨髁上骨折好发于
A.老年女性
B.老年男性
C.中年女性
D.中年男性
E.儿童