气相色谱法测定水中三氯乙醛时,萃取三氯乙醛的石油醚—乙醚混合溶液体积比为1∶1。
参考答案:错
解析:石油醚-乙醚混合液按2∶1体积比混匀。
下列关于簇优化准备工作中测试路线的制定,应遵循什么原则?
At the beginning of project execution,you notice different opinions between team members relating to project work and deliverables and to the level of overall complexity.What should you do right now ?()
A.Give your team members some time to develop a common understanding of the project scope and product scopUpcoming interface problems may be resolved late
B.Use the risk management processes to identify and assess risks caused by misunderstandings and develop a plan with measures in order to respond to the
C.Organize meetings to identify and resolve misunderstandings between team members in order to early avoid interface problems,disintegration and costly rewor
D.Use interviews in private with each individual team member to inform them of your expectations and your requirements in an atmosphere of confidenc