【简答题】完形填空。 Lisa has always been overweight. She wanted to lose weight, not just because she wanted to 1 more beautiful and he healthier, but also because it would make life easier. For example, it was 2 fo...
【简答题】发电机的额定电压()。 A高于同级电网额定电压5% B等于同级电网额定电压 C低于同级电网额定电压5% D高于同级电网额定电压13%
【多选题】关于变压器的额定电压,正确的描述是( )。
【单选题】She gave her money away because__________.
A.
she wanted to help the university
B.
she wanted others to have the chance to become nurses
C.
she wanted others to have the opportunity to escape a hard life
D.
she want to be remembered after her death
【简答题】简述电流继电器、电压继电器和中间继电器的作用?
【简答题】时间继电器的作用是(),中间继电器的作用是中转和放大,信号继电器的作用是动作指示,在继电保护装置中,它们都采用()式结构。