厚度小于()的突出煤层,可直接采用远距离爆破揭穿。
A、0.5m
B、0.3m
C、0.4m
D、1m
参考答案:B
—What’s worrying you, dear?
—Nothing. I was just thinking about the problem ______ tomorrow.
A.to be discussed
B.being discussed
C.discussed
D.discussing
简述讨价还价策略要点及让步策略的应用中应注意什么。