增加仓容的主要途径是（）
A.压缩“五距”
B.增加垛高
C.合理布局
D.拆除包装
参考答案：C
The Internet，as well as newspapers and magazines，________a more and more important part
in our daily life.[ ]
A．have played
B．are playing
C．is playing
D．has been played
煤层自燃的内在因素包括（）
A、煤化程度
B、煤岩成分
C、煤的含硫量
D、水分
