问题
单项选择题
+2.00DC×90°与-2.00DC×180°联合后得到()
A.+2.00DS/-2.00DC×90°
B.+2.00DS/-4.00DC×180°
C.+2.00DS/-4.00DC×90°
D.-2.00DS/+2.00DC×90°
E.-2.00DS/+4.00DC×180°
答案
参考答案:B
+2.00DC×90°与-2.00DC×180°联合后得到()
A.+2.00DS/-2.00DC×90°
B.+2.00DS/-4.00DC×180°
C.+2.00DS/-4.00DC×90°
D.-2.00DS/+2.00DC×90°
E.-2.00DS/+4.00DC×180°
参考答案:B