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电力变压器是变配电站的核心设备。下列对变压器的安装的安全要求中正确的是( )。A.
变压器的接地一般是其低压绕组中性点、外壳及其阀型避雷器三者共用的接地。接地必须良好,接地线上应有可断开的连接点
B.
位于地下的变压器室的门、变压器室通向配电装置室的门、变压器室之间的防火门
C.
居住建筑物内安装的油浸式变压器,容量不得超过500KV·A
D.
10KV变压器壳体距门不应小于0.8m,距墙不应小于1m(装有操作开关时不应小于1.2m)
E.
室外变压器容量不超过315KV·A者可柱上安装,315KV·A以上者应在台上安装;一次引线和二次引线均应采用绝缘导线;柱上变压器底部距地面高度不应小于2.5m,裸导体距地面高度不应小于3.5m;变压器台高度一般不应低于0.5m
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【简答题】完形填空。 Billy is a boy of fif. His parents died three years ago. One day when he was walking in the street, he 1 a wallet. He returned it to the owner, Mr Baker. He gave his 2 to the boy. As the boy...
【简答题】Billy is a boy of fif. His parents died three years ago. One day when he was walking in the street, he a wallet. He returned it to the owner, Mr. Baker. He gave his to the boy. As the boy had no j...
【多选题】小儿神经反射的发育包括哪几种类型（）
A.
出生时即有，终生存在的反射
B.
出生后即有，暂时存在的反射
C.
出生后逐渐稳定的反射
D.
出生后一段时间内可存在的病理反射
E.
出生后逐渐建立，终生存在的反射
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【简答题】阅读理解。 Once there lived a very exact(精确的) man. One day when he was walking in the street, an old woman came over and asked him,' Excuse me, where is the nearest restaurant?' 'The nearest restaurant? Yo...
【简答题】出生后逐渐稳定的反射包括
【简答题】完形填空。 Billy is a boy of fif. His parents died three years ago. One day when he was walking in the street, he 1 a wallet. He returned it to the owner, Mr Baker. He gave his 2 to the boy. As the boy...
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