[填空题]
The energy produced by a fission reacojkii+ c:9;ks ypmd:u ; muf *6vzid j-9u8vs:tor is about 200 MeV per fission. What fraction of th-u pyv 9d* udz::u8f;mv6sim je rest mass of a $_{92}^{235}\text{U}$ nucleus is this? The ratio is about $\approx 1 : $