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an; / the; a an; a the; /
UN ; USA ; UFO ; WTO USA ; UFO ; WTO ; UN UN ; WTO ; USA ; UFO USA ; WTO ; UN ; UFO
will be experiencing have experienced have been experiencing will have experienced
U<50%UN 50%UN≤U<85%UN 85%UN≤U≤110%UN 110%UN<U<135%UN
规定的工作范围: 0. 9Un~1. 1Un 扩展的工作范围: 0. 8Un~1. 15Un 极限工作范围: 0. 6Un~1. 15Un 极限工作范围: 0. 0Un~1. 15Un
0.05UN< UkCOS∮<0.2UN (-)0.05UN< UkCOS∮ <0.2UN (-)0.2UN< UkCOS∮ < (-)0.05UN (-)UN< UkCOS∮
0.9Un~1.1Un 0.8Un~1.15Un 0.6Un~1.15Un 0.0Un~1.15Un
in general in brief in short in particular
short for made of
named after short of
B.C.D.中选出一个能填入句中空白处的最佳答案。 The presidents of China and the USA had ________ interview a short time ago. —And it was ________ great success. A. an; / the; a an; a the; /
0.7Un-1.25Un 0.7Un-1.5Un 0.7Un-2.0Un 0.8Un-2.0Un
±2%UN; ±3%UN ±5%UN; ±3%UN ±4%UN; ±2%UN ±5%UN; ±2%UN
最大负荷时为1.05UN,最小负荷时为UN 最大负荷时,不低于1.075UN最小负荷时,不高于1.025UN 最大负荷时,不低于1.025UN最小负荷时,不高于1.075UN 任何情况下,电压都在1.02-1.05UN
2%UN; 3%UN 3%UN; 2%UN 5%UN; 2%UN 2%UN; 5%UN