站内坡度为（）‰的线路，在接触网停电检修“天窗”时间内，不得停留电力机车及其牵引的列车。
A.2.5
B.2.6
C.6
D.6.1
参考答案：D
Atlanta ____ a series of fierce fights between blacks and whites in the 1960s. [ ]
A. met
B. saw
C. happened
D. made
功能解毒杀虫，消肿止痢的药物是（）
A.雄黄
B.硫黄
C.大蒜
D.蟾酥
E.樟脑
