先行登记保存证据清单一式两份，一份附卷，一份交当事人。
参考答案：对
The work that needs to be accomplished to deliver a product,service,or result with the specified features and functions is called______。
A. Scope management B. Integrated managementC. SOW D. PMO
什么叫超声波？什么叫次声波？
