辐射式过热器布置在（）内。
A.炉膛
B.水平烟道
C.竖井烟道
D.尾部烟道
参考答案：A
Although many of the houses in the small town ______ still in need of repair, there _____ lots of improvement in their appearance.
A．are, has been
B．is, have been
C．is, are
D．are, was
五脏共同的生理特点有
A．贮藏精气
B．化生精气
C．实而不能满
D．与精神活动密切相关
