A.10組、每組測(cè)16s B.10組、每組測(cè)60s C.5組、每組測(cè)16s D.10組、每組測(cè)20s
A.R15/R60 B.R60/R15 C.R15/R80 D.R80/R15
A.邊開(kāi)關(guān)跳A相,重合A相 B.中開(kāi)關(guān)跳A相,重合A相 C.邊開(kāi)關(guān)跳三相重合三相 D.中開(kāi)關(guān)跳三相不重合