三相变压器原绕组末端连在一起,首端分别接三相电源,这种接法的表示方法为()。
A、Y
B、y
C、D
D、d
参考答案:A
Zhang Yimou, the director of Hero and House of Flying Daggers, on Sunday that he has two sons and a daughter with his wife, Chen Ting.
A.foresaw
B.teased
C.appointed
D.exposed
下列哪一个因素与休克肺发生机制无关()。
A.肺血管痉挛
B.肺毛细血管静水压增高
C.肺DIC形成
D.肺泡表面活性物质减少
E.肺泡,毛细血管膜通透性增高