Yd接线的三相变压器,不同的连接方式,可以接成六种不同的奇数组别
参考答案:对
一We don’t have enough money for our field trip .What shall we do?
一The best way_______money is to sell newspapers.
A.raise B. to raise C.raising
脾梗死
A.白色血栓B.混合血栓C.红色血栓D.透明血栓E.血栓栓塞