[填空题]
Protons are injected into the 1.0-km-radius Fermil zt( dp0fmj.epe55yq5.k1cq dab Tevatron wit:m3td-oqnj vf/um2r(u* p, hy h an energy of 150 GeV. If they are accelerated by 2.5 MV each revolution, how far do they travel and approximately how long does it take for them to reach 1.0 TeV? qmu:f md-,*2 v u3nr /jtpo(yhd$\approx $ $ \times 10^9\ \text{m}$
