高锰钢辙叉冶炼成分规定碳的含量为（）。
A.0.95～1.35
B.11.0～14.0
C.0.3～0.8
D.10.0～11.0
参考答案：A
—Guess what! I came across an old friend at the party last night.
—________ I’m sure you had a wonderful time.
A．Sound good!
B．Very well.
C．All right.
D．How nice!
井下作业地点对瓦斯浓度是如何规定的？
