下面现象中是旋转的有[ ]
A.转动汽车的方向盘
B.升国旗
C.狗拉雪橇
答案：A
整经工艺包括张力圈重量、经轴只数、整经根数、（）、卷绕密度。
They are good friends. is no wonder that they know each other so well.
A．This
B．That
C．There
D．It
