在比率制动式母线差动保护中,()均为比率制动原理构成的差动元件。
参考答案:选择元件和启动元件
I know the name of the pretty girl on the playground, but I am not sure . [ ]
A. how old is she
B. where she lives
C. where does she come from
D. how tall is she
全口义齿排牙时,上颌尖牙近远中向的倾斜关系是
A.颈部微向远中倾斜B.颈部微向近中倾斜C.颈部向远中倾斜角度最大D.颈部向近中倾斜角度大于中切牙小于侧切牙E.颈部向远中倾斜角度大于中切牙小于侧切牙