【单选题】列叙述错误的是( )
A.
用CuSO 4 ·5H 2 O检验酒精中含有的水
【单选题】Take a leaf out of Li's book
B.
Keep a lot of leaves for Li
C.
Ask Li to write a book
【单选题】Liu Li has ______ interesting book. And ______ book is from her parents. [ ]
【单选题】基于IP网络的视频会议系统采用的哪一种框架标准?
【单选题】2014-4-6.项目组织中主持工地例会的是