集中供风安装大型活塞式压风机。
参考答案：对
对划线部分提问.
1. Penguins come from the South Pole.
_____ _____ penguins come from?
2. A panda lives in china.
_____ _____ a panda live?
3. Julia and henry are from Australia.
_____ _____ Julia and henry from?
新疆棉田常用的灌溉方法有哪几种，列举说明其优缺点
