. It’s a secret. Why don’t we go and talk about this somewhere quieter? _______, you know.

A．Once bitten, twice shy

B．Moneytalks

C．Walls have ears

D．Like father, like son

在固定顶储罐中()应用最为广泛。

A.拱顶罐 

B.浮顶储罐 

C.内浮顶储罐 

D.双盘式浮顶储罐