离心式风机叶轮的作用？
参考答案：
叶轮被电动机带动旋转，带动叶片之间的气体转动，使气体获得大量能量，把气体甩往叶轮外缘，从蜗形外壳流出。
Li Ming said he_____playing computer games. [ ]
A. was interesting to
B. was interested to
C. was interesting in
D. was interested in
下列不属于中国人民银行主要职责的是（）。
A.制定货币政策
B.服务工商企业
C.防范金融危机
D.维护金融稳定
