石门揭煤时有哪些预防突出事故的措施？
参考答案：
石门揭煤时，通常采取的措施有震动性放炮、水力冲孔、钻孔排放瓦斯、金属骨架、高压注水等。
已知一个球队共打了14场，恰好赢的场比平的场数和输的场数都要少，那么这个球队最多赢了（ ）场．
Obama has been elected ________ first black President of the United States, and the international society expects to have ________ new USA under his leadership.
A．/；the
B．a；the
C．the；a
D．the；the
