变电所的直击雷防护设计内容主要有()、()、()、()、()、()等。
参考答案:选择避雷针的支数、高度、装设位置、验算它们的保护范围、应有的接地电阻、防雷接地装置设计
下列争取民族独立和民族振兴的运动中,促使社会性质发生变化的是( )
①美国南北战争 ②德意志统一运动 ③19世纪末埃塞俄比亚的抗意战争④俄国农奴制改革
A.①②
B.③④
C.②④
D.①③
补全对话。
A: Do you know what happened to Wang Fang?
B: 1______. I learned about it in the school newspaper.
A: 2______?
B: First , she heard her neighbour Mrs Fang calling for help.
Then she called 119 3______.
A: That's 4______.
B: Next she poured water over her trousers. But the fire burned her face and hands.
She was 5______ for three weeks.
A: Oh, 6______. Is she getting better now?
B: Yes. Many people brought her 7______.
A: 8______.
B: I'm very happy that she 9______ .
A: 10______.