单项选择题

In determining of Cl- by using Mohr method and Volhard method, the reactions are performed ( )
A、both in acidic solutions
B、both in neutral solutions
C、in neutral and acidic solutions respectively
D、in acidic and basic solutions respectively

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多项选择题

下列哪些属于特殊乘客

A.孕妇
B.B遣返乘窑.
C.C旅密IP
D.老人

多项选择题

下列哪些选项不是EI的最大传输速率()

A.lMbps
B.1.54Mbps
C.1.544Mbps
D.2.048Mbps

单项选择题

A.
B.
C.
D.