屋頂?shù)男问胶芏?,從外形看主要有平屋頂、坡屋頂、曲面屋頂和折板屋頂四大類?/p>
A.<3% B.3%~5% C.5%~15% D.3%~15%
A.7 B.10 C.14 D.28
A.刷冷底子油 B.干鋪一層卷材 C.花鋪一層卷材條 D.刷一道防水涂料