—It’s reported that a big shopping centre will be built in Hexi New Town.

—Really? I think it’s good news for my mother        bad news for my father.

A．and

B．but

C．or

D．yet

工业上，用于变换反应的催化剂有（）。

A、铁系催化剂

B、钴--钼催化剂

C、铜系催化剂

D、前三者全是