The boy __________about at the meeting won the first prize in the English competition.

A．talked

B．talking

C．is talking

D．who talking

（）漆类，涂膜坚韧，耐碱、耐溶剂，绝缘性好，附着力强；保光性、外观较差，适合作底漆和内用防腐蚀涂料。

A、醇酸

B、聚酯

C、环氧

D、橡胶