[问答题]
Which will give the greater improvement in the efficiency of a Carno 5i+1fuxc/uk0 ;jb el7yn4czxv;x;zrt engifhkmin93zf(t-k9ay(f b/* h2gw jrh *ne, a *f9wgfr/m( hk*a9kb-n jiy 3 2th( zhf10 $C^{\circ}\,$ increase in the high-temperature reservoir, or a 10 $C^{\circ}\,$ decrease in the low-temperature reservoir? Explain.