对于一个绕组有分接开关的多绕组变压器,可只测量带分接开关绕组对一个绕组所有分接头的变压比,而对第三绕组只测()。
参考答案:额定变压比
------She looks very happy. She ______ have passed the exam.
------I guess so. It’s not difficult after all.
A.should
B.could
C.must
D.might
“血海”既指:______,又指_______。