锅炉的型号有哪些？
参考答案：
锅炉的型号：亚临界、一次中间再热、自然循环、平衡通风、固态排渣、单炉膛、悬吊式、燃煤、汽包炉。
She is not on good terms with Mr. Smith; ______even if invited she would not attend his party.
A．otherwise
B．however
C．besides
D．therefore
教育工作的核心及主题是( )
A．坚持教育的公益性 B．全面实施素质教育C．立德树人 D．坚持教育的社会主义性质
