下列属于科研课题的特殊类型的有（）
A、专项课题
B、委托课题
C、自选课题
D、题
参考答案：A, B, C
— Good evening. Bell Tower Hotel.
— Good evening. ________?
A．What would you like, please
B．Do you still have a room for tonight
C．Is there anything I can do for you
D．Who is that speaking, please
涂料的3大组成部分是（）、（）、（）。
