PASSIM供料系统为使烟丝造碎程度降低，定量部分采用了低速转动，（）梳理。
参考答案：机械
The bookstore has sold _______children’s books as they did last year.
A．twice as much
B．twice as many
C．as twice many
D．as twice much
简述我国财政补贴存在的问题。
