–My family had a free vacation in the beautiful city last weekend. We had a lot of fun there.

-- _________.                         

A．It’s a great pleasure

B．I’m glad to hear that

C．You’re welcome

D．That’s very nice of you

镀锌板按生产及加工方法可分为（）。

A.热浸镀锌钢板

B.合金化镀锌钢板

C.电镀锌钢板

D.单面镀和双面差镀锌钢板

E.合金、复合镀锌钢板