测定FeCl3中Cl含量时,选用( )指示剂指示终点。
A.K2Cr2O7
B.K2CrO4
C.NH4Fe(SO4)2·12H2O
D.NH4SCN
参考答案:C
. —Would you like to join us in the game?
—_____, for I have something important to do.
A.I will
B.I’d love to
C.I won’t
D.I’m afraid not
DS6-11系统控显机通过带()的按钮信号采集板接受按钮信号。