下列哪项属于井下容易发生局部瓦斯积聚的地点()
A、采煤工作面上隅角
B、顶板冒落空洞
C、临时停风的掘进巷道
D、井底车场
参考答案:A, B, C
学习化学后,某同学有了如下认识,其中错误的是( )
A.生活污水处理达标后再排放
B.“油锅着火”,用水浇灭
C.我县部分出租车上标有“CNG”字样,说明这些出租车是以天然气作燃料
D.冬天用煤火取暖时要注意通风,防止一氧化碳中毒
There are strategies typically deal with threats or risk that may have negative impacts on project objectives if they occur, some other strategies are suggested to deal with risks with potentially positive impacts. ()is a risk response strategy that may be adopted for either threats or opportunities.
A.share
B.Mitigate
C.Transfer
D.Acceptance