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- 1关于电势差和电场力做功的说法中,正确的是( ) A.电势差是矢量,电场力做的功是标量 B.在两点间移动电荷,电场力不做功,则两点间的电势差为零 C.在两点间被移动的电荷的电荷量
- 2赵州桥是全世界最早的椭圆形石拱桥吗?
- 3The state also intervened to change the authority of parents over their children.
- 4row,learn,climb,listen,play,dance,study,work,read,washwatch,visit,am的过去式
- 5she decidedes she will go to Beijing next Monday.同义句 She_____ ______ _______ _______themselves.
- 6向硫酸铝溶液中逐滴滴入氢氧化钠溶液反应现象
- 7He has a friend. His father is a doctor.合并成含定语从句的复合句
- 8小华家的客厅长5米,宽3米,现要给地面铺上地砖,有50cm×50cm和30cm×30cm的两种地砖,应选哪一种比较合适
- 9顿时的近义词是?
- 10what is the longest word in English的答案