当前，公安队伍正规化建设的重点是( )
A．队伍建设
B．从严治警
C．“四统一”、“五规范”
D．依法治警
参考答案：C
The girl hid herself under the table she could see everything taking place in the room.
A．after which
B．from where
C．from which
D．in where
钛和钛合金被认为是21世纪重要的金属材料。工业上可通过电解TiO2的熔盐获取钛。TiO2中Ti的化合价为 [ ]
A．-4
B．+1
C．+2
D．+4
