关于钢筋加工的说法，正确的是（）
A.不得采用冷拉调直
B.不得采用喷砂除锈
C.不得反复弯折
D.不得采用手动液压切断下料
参考答案：C
Mary is as fast as, if not faster than, anyone in her class and should be on the team.
A．as fast, if not faster than, anyone else
B．as fast as, if not more fast than, anyone
C．as fast as, if not faster than, anyone else
D．as fast, if not faster than, anyone
在出口商品塑胶袋包装中，( )被禁用。
A．PPC胶袋
B．PVD胶袋
C．PVC胶袋
D．PEC胶袋
