Teachingbd...8. @ iii @ i, ii lii (So-R) o @ @ 2700 @ 3600 @ 4500 0 o D EFGH ABCD — 14 @ i e iii...
11
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Teachingbd...8. @ iii @ i, ii lii (So-R) o @ @ 2700 @ 3600 @ 4500 0 o D EFGH ABCD — 14 @ i e iii i, iii. ii lii 3 28 3.5 ABCD AC AADC 8 AD @ 1.2 @ 2.2 2.8 0