16．With a final conclusion _____, the meeting ended at 4:30 p.m. last Monday.

A．to draw

B．to be drawn

C．drawn

D．Drawing

下列铸铁牌号中，（）是铁素体可锻铸铁。

A.RQT600-3

B.QT600-3

C.KTZ550-04

D.KTH370-12