题型:填空题 ____ the computer competition quite well, he won the first prize.A. Preparing B. Having preparedC. To prepare D. Prepared 查看答案
题型:填空题 无功补偿的投切方式,在( )情况下,宜装设无功自动补偿装置。A.经常投入运行的变压器或配、变电所内投切次数较少的高压电动机及电容器组B.补偿低压基本无功功率的电容器组C.常年稳定的无功功率D.避免过补偿,装设无功自动补偿装置在经济上合理时 查看答案