[填空题]
A copper rod and an wr+ 8 uuk45e9,tidaijaluminum rod of the same leng*tocb0 9hzi 6rth and cross-sectional area are attached end to end (Fig. 14–18). The copper end is placed in a furnace maintained at a const 9zhb*roi60 ctant temperature of 250$^{\circ} C$. The aluminum end is placed in an ice bath held at constant temperature of 0.0$^{\circ} C$ . Calculate the temperature at the point where the two rods are joined. $^{\circ} C$
