配送中心的一些必要的岗位设置应由配送中心的()来决定。
A.目标
B.作业流程
C.利润
D.任务
参考答案:B
I can’t thank him too much, ____________ I couldn’t have finished the project in time.
A.without his help
B.with his help
C.without whose help
D.with whose help
铸铁焊条中的镍基焊条主要有()
A、纯镍铸铁焊条
B、镍铁铸铁焊条
C、灰铸铁焊条
D、镍铜铸铁焊条