---What did you do last night?

---I didn’t play the piano, _______, I watched a film with my parents.

A．but

B．and

C．instead of

D．instead

日常分析取样时要使水从取样瓶中溢出，溢出水量以取样瓶容积的（）为宜。

A.1/3

B.1/2

C.5倍

D.10倍