不锈钢水槽的表面处理有镜面、（）、亚光拉丝等。
参考答案：镜面抛光
.
--- It was a pity that you missed the famous star yesterday.
--- ______ I hadn’t returned to my hometown.
A．except that
B．only if
C．if only
D．even though
在催化剂预硫化时怎样选择硫化油？
