【单选题】中性点直接进行接地的电力网的主要优点是:发生单相接地时,接地电流小,系统()仍保持对称性,不影响对负荷的供电。
【单选题】--- Joan, what_________in your hand? --- Look! It's a birthday gift for my grandmother.
【单选题】My grandmother had________ over 50, 000 when she was sixty- five years old.
【简答题】My grandmother had a 1———— for the sun, a holy regard that now is all but gone out of mankind. There was a 2———— in her, and an ancient awe. She was a Christian in her later years, but she had come a ...
【单选题】Life was extremely hard in the past. My grandmother had no chance to go to school, even the ______ school.
【单选题】中性点不接地系统的主要优点是
C.
接地电流较大时,不会使线路发生谐振过电压现象
【单选题】It’s true that the bad news had a bad ______ on my grandmother.
【简答题】When my grandmother was raising me in Stamps, Arkansas, she had a particular routine(惯例)when people who were known to be whiners entered her store. My grandmother would ask the customer, “How are you ...