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?