变压器吊心检修的项目有:检修绕组和铁心;检修分接开关;检修套管;检修箱体及附件;检修冷却系统;检修测量仪表;清洗箱体及喷漆;滤油。
参考答案:对
If the price of potatoes is $0.20 per pound, what is the maximum number of potatoes that can be bought for $1.00 ?() (1)The price of a bag of potatoes is $2.80. (2)There are 15 to 18 potatoes in every 5 pounds.
A.条件(1)充分,但条件(2)不充分.
B.条件(2)充分,但条件(1)不充分.
C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分.
D.条件(1)充分,条件(2)也充分.
E.条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联合起来也不充分.
架空明线铜,铝绞线的回路特性阻抗为600欧±15%,应定为()线路。
A.一级
B.二级
C.三级
D.四级