圆钢制品配件焊修时两端对接中兴偏差不应超过（）mm。
A.0.5
B.1
C.2
参考答案：A
The books by Mo Yan are so popular that they are in great _______.
A．quantity
B．progress
C．production
D．demand
批处理活动一般都包括哪些内容？
