电压互感器二次绕组不允许开路,电流互感器二次绕组不允许短路。
参考答案:错
More highways have been built in China,___________it much easier for people to trave form one place to another.
A.making
B.made
C.to make
D.having made
下列哪种阑尾炎宜采用非手术治疗()
A.急性单纯性阑尾炎
B.慢性阑尾炎
C.急性坏疽性阑尾炎
D.早期单纯性阑尾炎
E.阑尾脓肿症状加重