铸造工艺最常用的方法是（）。
A.离心铸造
B.压力铸造
C.金属型铸造
D.砂型铸造
参考答案：D
— I'm too busy to go to the cinema with you, Mike.
— __ ____.The film is said to be a very good one.[ ]
A. That's all right
B. I'm so sorry
C. What a shame
D. It doesn't matter
简述柱面装饰的作用？
