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【单选题】
变电所配电装置构架上避雷器的集中接地装置应与主接地网连接，由连接点至变压器接地点接地极的长度不应小于( )m。A.
10
B.
15
C.
20
D.
30
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反馈参考答案：
举一反三
【单选题】When I wanted to express my thanks to him，words _____ me. I just held his hands firmly and choked.
A.
left
B.
fled
C.
forgot
D.
escaped
【单选题】听力原文：M: The driver must have been driving too fast. W: I don't think so. He crashed into the tree because he was trying to avoid a bicycle in front of him, Q: What happed to the driver? (18)
A.
He was driving too fast2
B.
He ran into a bicycle.
C.
He hurt his back and his head.
D.
He ran into a tree.
【简答题】a firmly held opinion, often a religious belief
【单选题】When I wanted to express my thanks to him，words ___ me. I just held his hands firmly and choked.
A.
left
B.
fled
C.
forgot
D.
failed
【单选题】定额材料消耗量的组成中，下列不属于定额规定的材料消耗量的是( )。
A.
场内运输不避免的损耗
B.
场内堆放不可避免的损耗
C.
加工制作的合理损耗
D.
场外运输不可避免的损耗
【单选题】Starting air valves are held firmly on their seats by_______.
A.
cam rollers on the camshaft
B.
spring force
C.
air pressure on top of the valve differential piston
D.
air pressure on the bottom of the valve differential piston
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