机械除尘器主要利用（）作用进行分离，捕集尘粒。
A.重力、惯性或离心力
B.电动力
C.冲动
D.阻力
参考答案：A
Banz and Reinganum found that small firms consistently outperformed large finns. This anomaly is referred to as the:（）
A. growth effect.
B. P/E effect.
C. size effect.
领导者的权力会随着职位的消失而消失。 ( )
