六轮滚花刀由三对滚轮组成，可以滚出粗细不同的（）种网纹。
A.5
B.4
C.2
D.3
参考答案：D
(2009安徽合肥质检)Having failed in many attempts，the bird managed to escape from the cage．
A．suddenly
B．naturally
C．immediately
D．eventually
现阶段加快推动EDGE/TD-HSDPA双模数据卡上市，数据卡外形主要是（）和USB接口两种。
