煤矿井口房和通风机房附近（）内，不得有烟火或用火炉取暖。
A、15米
B、20米
C、50米
参考答案：B
短文改错（共1小题，满分10分）
I still cannot believe that I am taking up this prize that I won it last year. I have to remind constantly I am really in AD 3008. Worried about the journey, I was unsettled for a first few days. As a result, I suffered “time lag”. This is similar with the “jet lag” you get from flying, so it seems you keep getting flashbacks from your previously time period. So I was very nervous and certain at first. However, my friend and guide, Wang Ping, was very understood and gave me some green tablets which help a lot.
多适用于采用新工艺、新方法、新材料等无定额可循的工程一般采用的估算方法是（）。
A．经验估计法
B．定额计算法
C．网络图法
D．横道图法
, I suffered “time lag”. This is similar with the “jet lag” you get from flying, so it seems you keep getting flashbacks from your previously time period. So I was very nervous and certain at first. However, my friend and guide, Wang Ping, was very understood and gave me some green tablets which help a lot.