二次试验工作应注意选用合适的仪表,如并接于电压回路上的,应用低内阻仪表。()
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当变压器发生少数绕组匝间短路时,匝间短路电流很大,因而变压器瓦斯保护和纵差保护都会动作跳闸()
George said nothing. He gazed at the distance, deep in thought.()
I'll write the message so as (to not) forget.()
Everyone in our class went to the international book fair.()