较大矿山事故（Ⅲ级）是事故已经或可能导致多少人以上死亡？（）
A.1人以上死亡
B.3人以上死亡
C.3人以下死亡
参考答案：B
Are you clear _____ what has been taught in this class? That is: Is everything that has been taught
in this class clear _____ you? [ ]
A. with; with
B. about; about
C. about; with
D. about; to
现场控制
