填空题: 下列四种气体(括号内是混有的少量杂质)，其中可以用如图5—11所示的仪器装置进行净化和干燥的气体是______________________________．<br /> <img src="http://www.weimei168.com/uploads/202208/20130110171299149914.jpg" alt="" border="0" /><br /> <img src="http://www.weimei168.com/uploads/202208/20130110171238173817.jpg" alt="" border="0" /><br /> <img src="http://www.weimei168.com/uploads/202208/20130110171270177017.jpg" alt="" border="0" /><br /> <img src="http://www.weimei168.com/uploads/202208/2013011017120952952.jpg" alt="" border="0" /><br /> <img src="http://www.weimei168.com/uploads/202208/20130110171269376937.jpg" alt="" border="0" /><br />