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