两台变压器并列运行应满足的条件是什么?
参考答案:
两台变压器并列运行应满足下列条件:
A.绕组结线组别相同;
B.电压比相等;
C.阻抗电压相等。
The doctor asked the man what _____. [ ]
A. the matter was
B. was the wrong
C. was the matter
D. was his trouble
射线照相主因对比度与入射线的能谱有关,与强度无关。