[填空题]
The scale of the universe (the average distan1)pev cg2*n( twgh;rn ce between galaxies)*:spvglga2d.ct 80m )te1ssr at any one moment is believed to have been inversely proportional to the absolute temperature. Estimate the size of the universe, co sst0)adm.l2s cr:p1*tegv8gmpared to today, at
(a) $t = 10^6\ \text{yr}$, $\approx$ $\times 10^7\ \text{ly}$
(b) $t = 1\ \text{s}$, ly
(c) $t = 10^{-6}\ \text{s}$, $\approx$ $ \times 10^{-3}\ \text{ly}$
(d) $t = 10^{-35}\ \text{s}$. $\approx$ $ \times 10^{-17}\ \text{ly}$
