下列有关“固--液反应，不需加热”的气体发生装置合理的是[ ]
A．
B．
C．
D．
答案：D
If you want to send your recording email, connect the recorder your computer.
A．by；on
B．from；to
C．by；to
D．in；with
汽包定排二次门在何处操作？
