根据建筑材料的使用功能不同,可将其分为无机材料、有机材料和复合材料。 ( )
参考答案:错
—Did you watch the basketball match yesterday?
—Yes, I did. You know, my brother _________ in the match.
A.is playing
B.was playing
C.has played
D.had played
小明在计算四个多边形的内角和时,分别得到下列答案,其中错误的答案是( )
A.1080°
B.5400°
C.2008°
D.180180°