[填空题]
A tungsten filament used inm5 myg.hf lu.- *uq7nn a;jq q+1cojnqo.gc: s7 flashlight bulb operates at 0.20 A and 3.2 V. If its resistance at 2q o. ns1 ;co+jq:7jcqg0$^{\circ}\,C$ is $1.5\Omega$ what is the temperature of the filament when the flashlight is on? $^{\circ}\,C$
