灰土地基采用压路机(机重6-10T)压实时,每层最大虚铺厚度可为()mm。
A、300~400
B、200~300
C、100~200
D、400~500
参考答案:B
Plastics and other similar rubbish that does not ______ may not be thrown into the sea anywhere.
A.break down
B.break away
C.break off
D.break through
综采工作面的喷雾装置有哪些?