- 搜標(biāo)題
- 搜題干
- 搜選項(xiàng)
單項(xiàng)選擇題
每個(gè)分相器單元輸出兩個(gè)相差（）相位角的信號(hào)
A.45°
B.60°
C.90°
D.180
A.45°
B.60°
C.90°
D.180
