如果忽略变压器一、二次绕组的()和电阻时,变压器一次侧电压有效值等于一次侧感应电动势有效值,二次侧电压有效值等于二次侧感应电动势有效值
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Participating schools will receive full credit for researching and reporting on their
A. species
B. type
C. category
D. sort
She commanded that the troops ________ the water.
A. to cross
B. crossed
C. to be crossed
D. cross
The ________ she felt over the death of her husband was almost too much to bear.
A. amazement
B. optimism
C. sorrow
D. confidence
Our holidays were ruined by the weather; so ________ have stayed at home!
A. it may be as well
B. it was just as well we
C. we might just as well
D. we might do as well as we