進(jìn)行采掘作業(yè)時(shí)，煤層中的大量瓦斯伴有煤粉、煤塊或巖塊，在極短的時(shí)間內(nèi)突然地涌出，瓦斯的這種涌出方式稱為特殊涌出
1、正確正確
暫無(wú)解析
IamsorryIhavenotimeatpresentto____moredetailorgiveyouanaccountofothercitiesofinterest.
---Wouldyouliketogooutforawalkwithus?
---_____,butImustfinishmyhomeworkfirst.
Breadandbutter（）likedbyWesterners.
Thepresentsituationforcedusto____thispolicy.
Theradiois________astrangesignal.What’swrongwithit?
