人民警察被辞退后，下列哪些物品需要交回公安机关( )
A．枪支
B．警棍
C．警衔
D．公文包
参考答案：A,B,C
Known _______ one of the four greatest ancient civilizations in the world, China is attractive _______ many foreigners.
A．for; to
B．for; for
C．as; for
D．as; to
黄土高原蕴藏量较为丰富的能源资源有[ ]
A．天然气
B．煤
C．水能
D．铁矿
