+2.75DS/-1.00DC×060=+1.75DS/+1.00DC×150
+3.00DS/-1.50DC×060 +2.75DS/-1.00DC×060=5.75/-2.50DC×060
33 +3.00DS/-1.50DC×060 與+1.75DS/+1.00DC×..-阿摩線上測驗