南京地铁二号线35KV开关柜采用()保护装置,DC1500V开关柜采用SEPCOS保护装置。
参考答案:阿海法
游离足趾移植再造拇指
—What's Mary doing?
—She's _____ the piano. [ ]
A. practice playing
B. practicing to play
C. practicing playing