单项选择题 听力原文：W: Would you like to go the concert with us?M: I'd rather watch the football match at home.What does the man mean?A．He prefers to listen to music alone.B．He thinks it is better to stay at home and watch TV.C．He prefers to go to the football match.D．He wants to play football than to go home.

单项选择题 即具有自重轻、构造简单、装配化程度高，又属环保、节能型的防水材料是（）。

单项选择题 木材的强度值中最高的是（）。