水泥助磨剂技术包括哪些内容？
参考答案：
水泥助磨剂技术是由“助磨剂母液合成技术、助磨剂复配技术和助磨剂应用技术”等三项技术构成。
A project manager does not have much time to spend planning before the mandatory start date arrives. He therefore wants to move through planning as effectively as possible. Which of the following would you recommend ？（）
A．Make sure you have a completed preliminary project scope statement and then start the WBS.
B．Create an activity list before creating a network diagram.
C．Document all the known risks before you document the high-level assumptions.
D．Finalize the quality management plan before you determine quality metrics.
尿沉渣常规检查时，标本制备离心处理所需相对离心力约为( )
A．200gB．400gC．500gD．800gE．1500g
