D the supplier selection, control and development.
供方的选择、控制和开发。
D组为空白对照组。
D. Procurement Documentation, Contract Change Control System, Payment System, Contract.
采购文档，合同变更控制系统，支付系统，合同。
Reviewing Ph. D. dissertations is very important to the control of the dissertation quality.
评审学位论文是把好论文质量关的重要环节。
Reviewing Ph. D. dissertations is very important to the control of the dissertation quality.
评审学位论文是把好论文质量关的重要环节。
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