有关山西省能源基地生态环境的破坏的叙述，正确的是（） ["所有煤矿开采都需要大面积开挖地表排弃大量土石","露天煤矿才需要大面积开挖地表排弃大量土石","燃煤发电极易造成大气污染而洗煤、炼焦对环境污染则很小","燃煤发电极易造成水体污染对大气污染则较小洗煤炼焦对对大气污染很大"]
配网设备分（）设备等级。 ["特别重要","重要","一般","严重"]
Frapping lines are fitted to lifeboat davits to（）. ["secure the lifeboat in the davits when in the stowed position","bring the lifeboat close along the rali in the embarkation position","give the occupants a safety line when the boat is being lowered from the embarkation level","reduce the swinging of the lifeboat at the embarkation level"]
说明市场营销观念与推销观念的区别。
设备信息包括（）等信息。 ["投运前信息","运行信息","检修试验信息","家族缺陷"]
甲苯的基本性质是什么？
