[填空题]
Protons are injected into the 1.0-km-radius Fermilabx36 lrz iq b;mos733bud1 2xf+akuu4 e Tevatrorcg )qbvtxee3u21ydfq)4 -q(n with an energy of 150 GeV. If they are accelerated by 2.5 MV each revolution, how4eeqrxtd3 v f )q-2qyu)g cb1( far do they travel and approximately how long does it take for them to reach 1.0 TeV? d$\approx $ $ \times 10^9\ \text{m}$
