暖风器
参考答案：
装设在空气预热器和送风机间的风道中，采用汽轮机低压抽汽加热冷风的一种管式加热器。
When Mom looked back on the early days of their marriage, she wondered how they had managed with ______ money.
A．so few
B．such few
C．so little
D．such little
城镇体系规划主要指导( )编制，以发挥上下衔接作用。
A．总体规划B．详细规划C．分区规划D．近期建设规划
