thanks for your sympathetic. i always don't understand why i have only 2 analog inputs with BNC2110, normally it should be "ai0,ai1...ai7 or some more", just like what is showed for the last step in the image,
http://zone.ni.com/cms/images/devzone/tut/a/5d95fe691059.gif
so my question is "if i want to mesure 2 or several inputs, voltage for one device, temperate for another...etc,for example, how can i do so???"
by the way, i have the 2, traditional NI-DAQ and NI-DAQmx