[填空题]
“Room temperature” i2hgk*t k9hrz8 s often tat+7u;v6sm .j ,cbzxx jken to be 68°F. What is this on the Celsius scale?+.u,7mbv;z jtx 6jsxc $^{\circ} $ C
(b) The temperature of the filament in a lightbulb is about 1800 $^{\circ} $ C. What is this on the Fahrenheit scale? $^{\circ} $ F