[填空题]
What is the average kinetic energyloxxf )nd2f0c;( y7zvh:ba8 w of protoob(;y37u1m it.lr spx ho;(mdns at the center of a star where the temperature imo7;ymhu i.1t o ;b rp(3ldx(ss $2 \times 10^7\ \text{K}$?
KE = $ \times 10^{-16}\ \text{J}$
KE = eV