装饰工程按材料分类可分为( )。
A.陶瓷类
B.玻璃类
C.涂料类
D.保护装饰
E.饰面装饰
参考答案:A,B,C
Along with the letter was his promise _____ he would visit me this coming Christmas.
A.which
B.that
C.what
D.whether
焦油连续蒸馏的主要设备有管式炉、蒸发器和()组成。