Y,d11接线的变压器,一次侧线电压超前二次侧线电压的角度差是()。
(A)330°
(B)30°
参考答案:A
休克抑制期的微循环改变是()
A.微循环收缩期
B.微循环扩张期
C.微循环衰竭期
D.直接通道开放
E.动静脉短路关闭
The letters for the boss ______ on his desk but he didn’t read them until three days later.
A.was put
B.put
C.has put
D.were put